It would appear that doublestandards apply on both sides of the aisle... but also some consistency.

http://abcnews.go.com/Politics/anthony-weiner-resignation-puts-scrutiny-delinquent-lawmakers-jobs/story?id=13860994

In all of her 20 years in Congress, Pelosi had never before publicly called on a fellow Democrat to resign until Weiner.

When Democratic Rep. William Jefferson of Louisiana was indicted on 16 federal counts in 2007, neither then-Speaker Pelosi nor Majority Leader Steny Hoyer ever explicitly called on him to step down.

Jefferson, who denied wrongdoing, served out his term despite the swirling allegations and intensive ethics investigations, and was only later tried, found guilty and sentenced to prison.

Pelosi and other party leaders also avoided public calls for the resignation of Rep. Jim Traficant of Ohio before he was expelled from Congress in 2002 after a felony conviction, or of Rep. Charles Rangel of New York, who was found guilty of 11 violations of House ethics rules and formally censured late last year.

In 2006, after Rep. Patrick Kennedy of Rhode Island smashed his Ford Mustang into a barrier near Capitol Hill under the influence of prescription drugs (police officers described him as "intoxicated") colleagues encouraged him to seek treatment -- not leave office for unbecoming behavior.

And few political historians could recall when a sitting U.S. president so directly suggested that a member of Congress -- much less one who had not been charged with a crime or violations of House ethics rules -- step down, as President Obama did regarding Weiner earlier this week.

[...]

Republican Sen. David Vitter of Louisiana, who admitted ties to the so-called D.C. Madam prostitution ring and later apologized, may have actually committed a crime of soliciting a prostitute. But he remains in office.

"I'm not relitigating the David Vitter situation," Republican National Committee chairman Reince Preibus told Fox News when asked if party leaders were being hypocritical.

During the months-long investigation into Sen. John Ensign, R-Nev., and his alleged cover up of a sex scandal with the wife of his former top aide, there were similarly no prominent public calls for him to resign.

[...]

Sloan speculated that the treatment Weiner received may have stemmed from a precedent set by Boehner in two recent "personal scandal" cases involving Republican congressmen.

At the first sign of sexual misconduct, Boehner urged Reps. Mark Souder, R-Ind., and Chris Lee, R-N.Y., to resign, even though their behavior didn't appear to involve any abuse of their office or illegal behavior.

At the first sign of sexual misconduct, Boehner urged Reps. Mark Souder, R-Ind., and Chris Lee, R-N.Y., to resign, even though their behavior didn't appear to involve any abuse of their office or illegal behavior.

Souder, an eight-term congressman and staunch social conservative, admitted to an extra-marital affair with a staffer and abruptly resigned in May 2010. Lee quit his office in February shortly after a shirtless photo he texted to a woman on Craigslist surfaced on the Internet.