There is no evidence to offer, purely his opinion.  Sorry if you don't know the difference between  lies & opinion.  Why do claims need to supported by evidence, there is no law that says this.  You just angry demanding things that apply in your head.  Global warming is not a fact, but you cannot prove it.  Could be earth cycles that happen no matter what you just don't know.  Trump can claim anything he wants & there is nothing you can do about it.  He does not have to provide evidence for anything.  He is putting a alternate idea out there which could be true or not.  It is not a hoax or lie.  It is probable and he mentioned it.  If you can prove otherwise then go ahead.  Your whole argument is not base on reality.  Trump admitted the Russians probably hacked them. No one can say for sure they had any influence over the election which is the opinion of the opposite side.  They are not lying either. I am not a Trump supporter but you make no logical sense.