Sunday shows

Lindsey Graham warns Trump that firing Mueller 'would be the beginning of the end of his presidency'

Sen. Lindsey Graham (R-S.C.) on CNN's State of the Union Sunday sought to distinguish between Special Counsel Robert Mueller's Russia investigation and the circumstances surrounding the firing of Deputy FBI Director Andrew McCabe, the latter including the allegation, as President Trump once put it, that the FBI became "a tool of anti-Trump political actors" in 2016.

McCabe's actions have "absolutely nothing to do with the Mueller investigation," Graham said, arguing that a new special counsel should be appointed to investigate the FBI.

He warned Trump against firing Mueller, suggesting that to do so "would be the beginning of the end of his presidency." Graham added that he believes Mueller is "doing a good job," pledging "to make sure that Mr. Mueller can continue to do his job without any interference — and there are many Republicans who share my view."

Watch an excerpt of Graham's interview below. Bonnie Kristian