It wouldn’t be hard to find grand jurors even in Florida who are anti Trump, Smith would just make sure to ask “Are any of you right wingers, if you are you are OUT” that is what happened in NY, anyone even the slim chance of having a Republican on the grand jury they were quickly booted
That would be jury tampering.
Well any grand jury just assume it’s rigged. The prosecutor will be there to ask “Did any of you vote for Donald Trump?” but there is no defense attorney to ask “Did any of you vote against Donald Trump?” in response.