As I've said before, I don't want impeachment to happen, the effect would be a less functional government than it already is and would add more divisiveness to an already sharply divided electorate. Republicans would claim there are democrats who want to impeach mainly because of political differences with Trump, and they'd be right, and Democrats would claim Republicans are only opposing impeachment because they politically ally with Trump, and they'd also be right. But there does come a point where impeachment has to happen because that's what a truly great country does when faced with a fundamentally corrupt President, and I think we might be at that point.
Russian interference is a basic threat to our sovereignty, and we have a President who traded the protection of that sovereignty for protection of himself and his inner circle, that's a level of corruption that exceeds what we should allow in the position of President.
Even with a generous benefit of the doubt, there doesn't appear to be any basis for believing that Trump wasn't concerned about the investigation, and there's plenty of reasons why he had good reason to be concerned, so I'm not buying that he just accidently acted really guilty. He knew his campaign had been at least attempting to coordinate with the Russian government, and publically admitted to interfering with the investigation because they were looking into Russian interference and Trump campaign ties to the Russian government.