Who knows? Maybe an air-tight case of perjury is enough to kick some Republican senators' butts so they will convict. Don't forget, they still have a perfectly good Pence sitting in the wings ready to take over and keep the Presidency in Republican hands. They might even do better in 2020 if they do go with Pence now. Stick with Trump and they lose the Presidency and the Senate.
Keeping Trump in office until then is really a Democrat wish now. He's done more for the Democratic Party than Clinton and Sanders combined.