President Donald Trump and Sen. Bob Corker escalate their Twitter feud

This isn't the first time the two Republicans have traded barbs.

Corker, R-Tenn., appeared this morning on several news shows, questioning Trump's capabilities in dealing with North Korea and standing by his earlier claims that Trump has turned the White House into an “adult day care center.” Trump then returned the favor, attacking Corker as a "lightweight" and saying that Corker is "fighting Tax Cuts."

Earlier this month, Corker angrily responded to Trump’s assertion that he decided not to run for another term after Trump refused to endorse him.

Here's the Twitter back-and-forth between Trump and Corker.