On what basis? Too many Democrats? Sadly, no.
I am not a lawyer. That said, a case can be made that any jury in DC is prejudiced against Republicans and Trump by virtue of polls, election results and media coverage. We are still guaranteed a jury of our peers. At the very least, juries need to be composed of a cross-section of the national electorate.
This may all be moot, actually. I believe Presidents cannot be tried in civilian court while serving. The only allowable Constitutional venue is Congress and they need super majorities to impeach and convict on very explicit, specific grounds, which have not been met.