If Republican senators acquit President Donald Trump as expected on Wednesday, they still will have important choices to make about their justification for taking such action, a Tulane University impeachment expert says.

“If they stick to disputing the facts, they might look ridiculous,” said Stephen Griffin, a constitutional law professor at the Tulane School of Law. “What most of them are doing so far is not disputing the facts. They are saying the facts don’t rise to the level of impeachment.”