Two Republican senators say President Donald Trump would be wise to keep a public silence on an independent investigation into his 2016 campaign's contacts with Russia.

That's in the wake of news reports that he sought to fire the special counsel.

The senators, Lindsey Graham of South Carolina and Susan Collins of Maine, also urged special counsel Robert Mueller Sunday to review whether Trump tried to fire him last June, an accusation the president has labeled "fake news."

Graham, co-sponsor of legislation that would protect Mueller from being fired without a legal basis, said he would be "glad to pass it tomorrow." But he insisted that Mueller's job appeared to be in no immediate danger, pointing to the political costs if Trump did remove him.