Transcript for Trump faces GOP revolt over Mexico tariffs
president facing mounting pressure from his own party over his plan to impose tariffs on Mexican imports and they're calling it a tax on American consumers and here's Mitch Mcconnell. Well, there is not much support in my conference for tariffs, that's for sure. Look, I think it's safe to say you've talked to all of our we're not fans of tariffs. We're still hoping that this could be avoided. Our senior congressional correspondent Mary Bruce joins us from capitol hill. This is the most serious revolt yet from senate Republicans. Reporter: The president is used to them standing by him. Now he is facing serious blowback like he's never seen before. The message from Republicans here on the hill is loud and clear, do not do this and if the president does go ahead and impose these tariffs they stand ready to block him. Even some of the president's top allies are publicly blasting this move. We heard from senator Ted Cruz. He says the president is playing a game of chicken with Mexico and says there's no reason for his constituents back in Texas to pay the price for a massive new tax. Republicans I've talked to are still holding out hope all this can be avoided. The vice president and secretary of state today will be sitting down with Mexican officials to hammer something out but, George, it's still not clear exactly what Mexico needs to do, what steps they need to take to stop the migration and the president is making it clear he plans to move ahead with this Monday. He says he hopes there's an agreement but more likely the tariffs will be imposed. On another front they stonewalled against testimony on having anything to do with the Mueller report continuing, it's deepening. Reporter: There are two more people we can add to the list of white house officials not complying with Democrats' the white house has now instructed the president's former communications director hope hicks and the former chief of staff to without counsel Ann Donaldson not to comply. Hope hicks was a key figure by the president's side throughout much of the campaign and during several key moments during his first year in office. She has turned over some documents related to the campaign but the administration says these subpoenas should have been directed directly to the white house. Mary Bruce, thanks very much.
This transcript has been automatically generated and may not be 100% accurate.