Guess what: 97% of climate scientists worldwide come to the conclusion that global warming is anthropogenic (man-made).
How rational is it of non-scientists to believe otherwise? Not rational at all.

And regarding Trump: I don't know to what extent he has fulfilled his campaign promises - but certainly there are much WORSE things than not keeping campaign promises. For example, giving youngsters a perfect model that conveys the message that lying is perfectly ok, being selfish is a good principle for life, sacrificing basic human rights of people BORN intersexual or transsexual for the sake of ill-minded religious convictions is a good stance etc. etc.
I'm wishing the Democrats the best of luck in carrying out their constitutional duty of checking what's going on in the White House.