Donald Trump's latest feud has been getting rather personal online.
The clash erupted on Sunday after the US President posted a series of tweets, saying Tennessee Senator Bob Corker had sought an endorsement from him in a re-election bid.
The chief of staff for Corker refuted this, saying Trump had been the one who reached out to Corker, calling the Senator and urging him to seek election again.
The US President, in typical style, fired back on Twitter, saying the senator had "begged" to be endorsed again, and had to drop out when Trump refused because he "couldn't win without" him.
Stepping up the trash-talking, the President said Corker "didn't have the guts to run", and he fully expected him to be a "negative voice."
The Tennessee Senator fired back by saying the White House had become "adult day care" and in an interview with The New York Times, said Trump was treating the Presidency like "a reality show".
Corker also claimed the President's threats against other countries had set the world on the path to World War Three.