democrats or just republicans, it's about mixing it up. >> reporter: that's right, tom. we actually interviewed mark williams. he's the chairman of the tea party express three tour. i want you to take a listen at some sights that he's putting in the crosshairs of politicians. >> we need to purge both parties. we need to purge the democrats, we need to purge the republicans. and we're on a rhino hunt. we're going to drive them to political extinction of the political party. >> let me ask you about this. one of the questions we have about the tea party is the ability of the party to coalesce about what they're for, as opposed to just what they're against. it's easy to push people out by saying what they're against or for. how much are you seeing this movement focus itself about what it stands for, so that if it starts recruiting its own candidates in a big way, we know what that's all about.