. >> reporter: gop leaders like missouri's roy blount downplayed the drop in coverage. >> the congressional budget office is notoriously bad at anticipating what's going to happen in a marketplace. >> reporter: and, they note, the cbo did some find some upsides. >> lower taxes, lower deficit. >> reporter: it sounds like you're saying the part of the cbo analysis you like are accurate and you parts you don't like are flawed. >> um -- that's not what i was saying. i pointed out the part that i think is an accurate reflection of the tax reduction. it's pretty hard to predict coverage when the government stops telling you, you have to buy something you don't want. >> reporter: one of the bill's authors says that he and other gop leaders are considering some changes to the bill's tax credit system. but other republicans aren't waiting around to find out who they come up with, anthony. in fact, just this evening, a florida congresswoman became the latest lawmaker to say she's voting no. >> nancy cordes, thanks, nancy. >>> the fbi is investigatng whether the trump campaign had improper contacts wi