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.