I don’t know. The fbi comes to the White House. The Potus tells the secret service to stand down. Game over
We’re told that it’s longstanding DOJ policy that a sitting POTUS cannot be indicted. Assuming that is true, no such scenario plays out. I believe it to be true, because DOJ is not an independent agency it serves under the Executive. They cannot arrest their boss against his wishes. Worst case, he fires everyone. That kind of scenario of course would be politically damaging and lead to impeachment proceedings imo. But afaik, he cannot be nor won’t be arrested. Most likely, if there are really ‘goods’ against him and he knows he is cornered, then he would resign for the good of the Republic.
FWIW, I think this whole thing is a witch hunt. As Dershowitz noted, nearly all the convictions are process crimes. They are trying to create a case, not investigate one. They are a distraction and cover-up from the real crimes of the Obama admin and the Clinton campaign.