So which crime has Trump been convicted of that you are referring to. And if you don't think it a bit strange that Hillary made one of the most brilliant trades in history in the Whitewater scandal or that more than $100 million was donated to the Clinton Foundation by groups involved in the uranium deal.
Or that Biden's son was raking in millions of dollars for no particular reason that anyone can think of other than his name, then you are being either obtuse or naïve.
Obama had a shady real estate deal early in career in Chicago, but with respect to criminal activity for profit there is no evidence of anything like that since rising to national prominence.
Don't confuse your loyalties with the facts. I am not a particular supporter of Trump the person. I find his past womanizing reprehensible, but I do try to be open minded and look at the facts and not allow bias to color my opinions.
I think the reason Trump scares Democrats is he was a populist and not a Republican. As such more than any President that represented the Republican party, he made huge in roads garnering significant votes from a range of historical Democratic constituencies including union workers, Hispanics, African Americans, etc. His personality caused him to lose support among white suburban women. His policies put him at odds with many of the countries most powerful and wealthy individuals.
And this lies at the root of why Democrats feel it is essential to destroy Trump. If he lends his support to someone a candidate with an appealing personality, the Democrats are at risk of losing power.