You sure do like those right wing propagandists.
For the record, it's not the Democrats who are investigating Trump. It's the FBI, it's the independent counsel appointed by the Assistant Attorney General, appointed by the President, it's the Republican led Senate, and the Republican led House, it's any number of other security agencies.
And if you don't think treason is a big deal, you are sorely misinformed.
House & Senate might have Republican plurality but investigation by bodies of Congress is bipartisan. But seriously, what is the point of disabusing people who want to see the world as they choose as opposed to how it actually is? Everyone knows facts always be hatin'.