You're twisting the truth a little bit there WM.  The FBI are looking into his ties with Russia.  There has been no release of any findings of guilt that I'm aware of. 

Trump is an international businessman and so are the people he knows and trusts. To make a claim that he hired a "Russian campaign manager" is an out right falsehood. According to wiki:
Paul John Manafort, Jr.[1] (born April 1, 1949)[2] is an American lobbyist and political consultant.

I'm okay with you being liberal.  But at least be honest and don't make things up.  That's how false news gets spread.  I'm sure you don't want any conservative spreading false news???  I don't either.  I want truth and if the statement is an opinion, than say it's an opinion. No matter which political direction a person leans.

PS  I like the way you justify it by saying "rational" people.  Rational people rationalize!