Virtually everybody who ever set foot in Washington lies. That's DEMOCRATS and REPUBLICANS. The trick is to convince the average Joe that they've got his best interest at heart. They don't. The only things you can rely on outta DC are that (A) Money will protect itself regardless of who suffers (B) EVERYONE in DC will say whatever they think they have to in order to be re-elected - EVERYONE.
This "my team" versus "your team" stuff is better left in a stadium. Vote for the man (or woman) based on how their record/history aligns with your values, not what comes out of their mouth when it's time for re-election. Like Ben Franklin said "Believe none of what you hear and only half of what you see". Politicians, regardless of their initial intentions, almost always end up as professional liars. It's what the system wants and how it works.
Part of the reason Washington so screwed up is people blindly cheer-leading on the party line. If you voted for individuals (Soap Box - and term-limited EVERYONE), you might see the effectiveness of the government grow dramatically. Right now all we've got is inaction coupled with childish bickering/name-calling. Electing Romney...or re-electing Obama...changes very little.