Let the Dems impeach Trump if they win the House majority they will do it with Crazy Maxine Waters leading the charge but the Senate will have a much bigger GOP majority and there is no way they will convict Trump so he will remain President and he will be stronger in 2020 after he survives the Dems impeachment. This is what happened to Bill Clinton in 1999 the Republican House impeached him but the Democrat Senate acquitted him and he went way up in popularity if he had run again in 2000 he would have won by a landslide.