Washington (CNN) President Donald Trump is embracing a former campaign adviser who stated that he won't testify against him as part of Robert Mueller's investigation, while calling for a "full and complete" prison sentence for his former lawyer, Michael Cohen, who is cooperating with the special counsel.

In a series of tweets, Trump said Monday morning that Roger Stone, a Republican political operative and longtime Trump ally, has "guts" for saying that he won't testify against the President.

"'I will never testify against Trump.' This statement was recently made by Roger Stone, essentially stating that he will not be forced by a rogue and out of control prosecutor to make up lies and stories about 'President Trump.; Nice to know that some people still have 'guts!'" Trump tweeted Monday morning.

Trump's politically charged tweets came as much of the nation's attention was on the late President George H.W. Bush, whose body was being transported from Houston to Washington, DC, to lie in state in the rotunda of the US Capitol until Wednesday morning.

Stone has repeatedly said he won't testify against the President. Most recently, Stone told ABC's "This Week" on Sunday that "there's no circumstance under which I would testify against the President because I'd have to bear false witness against him.

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