Washington (CNN)President Donald Trump ripped Sen. Bob Corker on Tuesday morning after the Tennessee Republican criticized the President's involvement in Capitol Hill tax negotiations.

The exchange between the two men escalates a public feud that has highlighted divisions between Trump and several Republican lawmakers on Capitol Hill. And it comes on a day when Trump is visiting Capitol Hill for high-stakes discussions about tax reform, threatening to send the President off-message at a critical time for his agenda.

Corker, later asked by CNN's Manu Raju if he should have backed Trump's presidential campaign, said he "would not do that again." He also said Trump has "great
difficulty with the truth."

In a series of tweets, the President accused Corker of fighting tax cuts and called him a "lightweight." Corker responded by again likening the White House staff to a "daycare center."