We have done a fair amount of work to categorize this group -- we call them cast iron conservatives -- and what they believe. But, what districts they represent across the country is another piece to the puzzle of understanding a bloc of Members that are currently exercising influence within the Republican party well beyond their raw numbers. That's where this terrific map from New Yorker comes in. It details the congressional districts where the 79 Republican members who signed a letter in August demanding that Boehner pass legislation defunding Obamacare represent. (This, like all single measures, is an imperfect one but it captures the general gist.)
Not surprisingly, none of the tea party conservatives represent districts won by President Obama in 2012. That's consistent with the conventional wisdom that many of these Members need never worry about losing a general election but rather only face the possibility of a serious challenge in a primary, making them more likely to hew to the conservative line. In terms of states, Texas leads the way with 11 Republican signees of the defund Obamacare letter. No Northeastern state has a single tea party conservative in its ranks.