I can't stand Trump. I throw up a little in my mouth when I see or hear him. Put him and Hannity together, and I get bulimic. But...I hope the democrats DON'T go after tax returns, or Russians or anything else. I hope they introduce legislation. I hope they work for the country. If the Republicans in the Senate want to obstruct - use that in the 2020 campaign. But if they focus on Russia and tax returns, then they are no better than the Republicans they replaced, who focused on emails and Benghazi, and they will almost guarantee that the Republicans will retake the house in 2020..
And forget about impeachment - you have to look at who would take over if Trump is impeached. Trump is bad - Pence is worse. It would open the door to an American theocracy.