Sleazy Politician

Politician, n. An eel in the fundamental mud upon which the superstructure of society is reared. When he wriggles he mistakes the agitation of his tail for the trembling of the edifice. As compared to the statesman, he suffers the disadvantage of being alive.

—Ambrose Bierce, The Devil's Dictionary

Democracy: Noun. Informal. A form of government in which people, faced with the prospect of self-rule, cast the job into an exclusive mire of unskilled panderers.

—Thorax, 9 Chickweed Lane

A Sleazy Politician exemplifies the worst stereotypes of politics; they take bribes, engage in blatant hypocrisy, face constant personal scandals and are generally unpleasant people to be around. Often, they are based on caricatures of real-world politicians, or amalgams of them—especially ones that fall into Acceptable Political Targets. They tend to be shown with almost no charisma, too, which tends to make you wonder how they got elected in the first place. When taken to extremes, they will often have No Party Given, though they can also be used as a Strawman Political against one specific party, ideology, or against government in general. See also Corrupt Politician and Obstructive Bureaucrat.

No real life examples, please; there is a very high risk of such examples devolving into political debate, which is not the sort of entertainment this wiki is really looking to provide.

Examples of Sleazy Politician include:

Comic Books

Every politician in Sin City is this Turned Up to Eleven. Case in point: Senator Roark. He's so corrupt that he is perfectly willing to allow his son to rape and murder little girls, going so far as to protect him from honest detectives.

Film

The deputy mayor in Ikiru, who, after doing his damnedest to crush Watanabe's attempt to get a park built out of petty turf guarding, tries to take credit for it even at Watanabe's funeral.
Bill Heslop, local councilman for the fictional Australian town of Porpoise Spit in Muriels Wedding, has spent most of his political career positioning himself to get kickbacks for building projects as a local councilman in Porpoise Spit, and also makes a habit of cheating on his wife and emotionally abusing his kids.

Literature

Probably subverted, but possibly played straight, in Edwin O'Connor's novel The Last Hurrah. Frank Skeffington hands out political favors in exchange for loyalty, neutralizes political opponents by offering them jobs for which they are totally unqualified, distributes money from a glorified slush fund... and is positively beloved by the citizens of his city- even by many of those who vote against him. The film version is a definite subversion, which unambiguously depicts Skeffington as a positive figure.
- Skeffington is an Expy of a Real Life mayor of Boston during the heyday of machine politics.
Tomer Darpen, Wedge's diplomatic liason in Starfighters of Adumar. Mind, what he did was all in service to the New Republic, more or less, but Wedge Antilles strongly disagreed with the strict Ends Justify The Means instructions. Which involved slaughtering the inferior native pilots to play up to the Blood Sport-happy local culture and helping to crush dissenting nations rebelling against the local country's New World Order. When Wedge refused, Tomer lied to the country's leader and the order was sent out to have Wedge and his pilots killed.
Congressman David Dilbeck in the Carl Hiaasen novel and film Striptease.
Greg Stillson in Stephen King's The Dead Zone regularly uses illegal methods, such as blackmailing businessmen to finance his campaigns, and intimidating whistleblowers with thugs. However, he's very charismatic, constructing an highly likeable public persona.
Littlefinger from A Song of Ice and Fire certainly qualifies; the brothels he owns are nothing compared to the fact that he's made frequent sexual advances on his barely teenage niece-by-marriage and semi-adoptive daughter.
High Ridge and company are the spitting image of sleazy politicians in Honor Harrington. Not only are they, well, sleazy they are stupid and they dump Manticore in a new war so clumsily without trying. Their incompetence is so great that it is proof of course that they had no intention of doing so. If they had actually wanted to renew hostilities, Manticore would have remained at peace. But their combination of selfishness and stupidity nearly brought their country to ruin.
- Eloise Prichart, President of the Manticoran's rivals, the Havenites, found more then a few of these on her own team. Her Secretary of State was the worst of the lot being not just sleazy but treasonous.
In the Vorkosigan Saga, the more brutal dealings of more, well, interesting times have devolved into more or less normal dealings of politicians. For instance in Miles in Love a Succession Crisis that might once have been solved with an assassination or a little civil war is cheated at with an attempted mugging. As the bad guys desire to render the candidate unfit to have heirs (by the obvious method) it is bad enough. But they are not trying to murder him, at least.
- More normal is favor trading and attempted blackmail. The first is fairly harmless of course (either a count agrees to vote on another's pet project or he doesn't). The second can lead to a threat to accuse the Emperor's counselor of murder and either adultery or sexual harassment (depending on the wife's degree of cooperation). Thus by implication threatening to dishonor a woman who was not even involved in politics as a mere collateral damage.

Live Action TV

All the politicians in Blue Bloods give off a vaguely uncomfortable scent and are shown doing things like Nepotism, overpandering, or simply haggling over things that shouldn't be haggled. But they usually also have more-or-less of an intention to do right by the public (however they interpret doing right), and if they like power, well everybody gets paid for their job.
Pawnee City Councilman Bill Dexhart of Parks and Recreation fits this to a T, complete with sex scandals, religious and social hypocrisy, and incredibly obvious sleaze, to which everyone is completely oblivious because he's so good looking (and because nobody cares about local politics).
More or less averted (!) in Yes Minister: Even at his pandering lowest, Jim Hacker still understands right and wrong and has a sense of duty to his constituents and the British people. He's more pathetic than despicable in his (often half-baked) attempts to win popularity. As his wife put it, he's a "whisky priest" who recognizes that what he's doing is wrong and still feels bad about it.
Similarly, the various politicians in The Thick of It are more incompetent than corrupt, and though they can be petty, venal, arse-covering self-promoters, it is rare for them to do anything more serious than screw each other over.
- Possibly the reason they don't do anything worse is because they're terrified of what Malcolm Tucker would do if any real political sleaze found its way into the papers.
Londo in Babylon 5 is a more sympathetic take on this, being a Tragic Villain with redeeming traits, rather than just a villain.
Mayor Arthur "Artie" Worth in the Black Scorpion. His crooked actions result in the Origin Story for several Supervillains. When the title character asks who would benefit from his death, her colleges give a long list of people.
Alan B'Stard in The New Statesman. In fact, every politician in The New Statesman with the possible exceptions of Sir Stephen Baxter and Bob Crippen.
Boss Hogg in The Dukes of Hazzard.
The Ethics Commissioner of all people in an episode of Dan for Mayor.
Almost every politician on Boardwalk Empire would qualify.
Senator Clay Davis of The Wire engages in much fraud and bribery over the course of the series and associates with known drug dealers, and for bonus hypocrisy claims he's using money defrauded from charitable organisations to help impoverished citizens in his district. According to David Simon, he's based on several real life Maryland politicians.
Mayor Hernandez (George Lopez) on Reno 911! definitely qualifies; his infractions include drug use and adultery.

Manga and Anime

The seinen manga Akumetsu is rife with these guys, who the title character has taken it upon himself to eliminate.

Theatre

Senator Titus Savage in The Curious Savage. When a character marvels that he keeps getting sent to Washington by the voters, his mother says it's common sense: "It's the only way to keep him out of the state."

Video Games

Snattle of Pokemon XD desires governorship over Orre. He fits here because a combination of Evil Feels Good, Deal with the Devil, and Jumping Off the Slippery Slope sends him screaming into Complete Monsterdom in record time.
Just about every politician ever in the Grand Theft Auto series.

Western Animation

Mayor Quimby is a very good example of this.^[context?]
- As is Senator Mendoza. No, not that Senator Mendoza.
As shown in the episode The Voting of the Doomed, Zim is definitely a Sleazy Politician when it comes to winning the class president election.
Futurama has Richard Nixon's head. He displays all the sleaze of the real-life man turned Up to Eleven, with an extra heaping helping of insanity.