Tennessee GOP Senator Bob Corker would not rule out the possibility of challenging Donald Trump in the 2020 GOP Primary campaign, according to an interview with reporters on Friday -- according to ABC News. Claiming that he does not even know what he is "going to do next Sunday," Corker would not confirm that he is contemplating challenging Trump in his own Republican Party. However, the outspoken, two term Senator did not rule out a possible presidential bid either. Corker, who announced recently that he will not be seeking re-election to the Senate in 2018, stated that he is focusing his energies on "the next fourteen months" of his term in office as a Senator.

Comrades against Trump

Senator Corker is joined by Senators John McCain, Jeff Flake, and Ben Sasse in his criticism of Donald Trump and his arrogance and condescending leadership style. Corker had gone so far as to state that Trump was leading the United States towards nuclear war with North Korea with his reckless tweets. McCain and Flake both questioned Trump's behavior in relation to the media, his well-publicized inappropriate remarks to the widow of a fallen soldier, and his cavalier attitude toward anyone who dares to question his actions in any way, shape, or form.

Ben Sasse was highly critical of white nationalist and Trump comrade Richard Spencer, calling him a racist and a "brown shirt pajama boy." Sasse also questioned Trump's call for the revocation of the licenses of television and radio stations that criticize him.

Sasse went so far as to ask the president if he was "recanting" his Oath of Office promise to defend the First Amendment.

Attacks against Tillerson

Senator Corker, who stated that despite the Mueller investigation, there is not going to be an impeachment of President Trump, had overtly challenged Trump for criticizing his own Secretary of State Rex Tillerson.

Trump tweeted that Tillerson's negotiations with North Korea were "a waste of time." It is believed by many observers that Trump's comments could have an adverse effect on Tillerson's efforts to prevent nuclear war.

Corker's political future

At this point in time, it is unknown if Corker will announce his candidacy for president.

However, it would be naive to assume that Corker is going to have a sedentary retirement and just sit back and observe political events from afar. If he is contemplating a presidential run, Corker will have to form an exploratory committee. A Super PAC also might be opened in Corker's name; but Corker would not be involved in creating it.

Both an exploratory committee and a Super PAC , if created, are no guarantee of a Corker presidential run. However, they are an indication that Trump might have at least one GOP challenger in 2020, even if Trump calls him "Liddle Bob Corker." Whether or not name-calling will work for Trump in 2020 like it did against "Little Marco" in 2016, remains to be seen. Trump may find that a few other issues, such as his record as president, may play a role in the 2020 GOP primaries.