Heritage study: Most conservative member of Congress is...

The most conservative member of Congress, according to Hertage Action (an advocacy arm of the conservative think tank The Heritage Foundation), is Sen. Jim DeMint (R-S.C.).

Bachmann is in the 99th percentile of congressional Republicans, according to the Heritage scorecard, which evaluates votes by members on legislation deemed important, as well as their sponsorship of a given bill. Key votes include the repeal of President Obama’s healthcare bill, for instance, or defunding NPR.