"you need to go big or go home. tweet out there that you support the president." but yovanovitch refused and was later removed from her post. she testified that she felt "threatened" after learning trump told the ukrainian president she was "bad news" and was "going to go through some things." in the face of mounting evidence, republicans on defense. >> there are perfectly appropriate quid pro quos and there are inappropriate quid pro quos. >> reporter: on cable tv, insisting there's nothing to see here. >> hold on, we have mark meadows right here. congressman meadows, can we talk -- so, he's walking by right now. but republicans are really struggling to defend -- okay, great. >> i'm not struggling on anything. >> okay, so, congressman -- >> the republicans are not struggling on anything. >> mary bruce live from the hill tonight. and mary, republicans say they're not struggling, but tonight, the white house is beefing up its team to handle the impeachment inquiry? >> reporter: well, david, the white house may be dismissing these hearings, but they also know that they need a better