Problem with #2:

Double jeopardy (from the 5th Amendment, I attached the text) says you cannot twice be put in jeopardy of criminal punishment.

The only jeopardy he faced in the Senate trial was whether he would be removed from office.

Moreover, the impeachment clause actually says that after being tried in the Senate you can be criminally charged. (I attached that as well.)

It's all right there in the Constitution.

4/