Holy Cross Political Science professor Alex Hindman says impeaching President Donald Trump even when he's out of office has a purpose.

He said, "There's a clause in the Constitution that disqualifies him from any office, elected office afterwards."

No president in U.S. history has been impeached twice.

Lawmakers are also looking into the 25th Amendment, something which has only been invoked on two presidents: Ronald Reagan and George W. Bush.

But the two former presidents underwent surgical procedures and general anesthesia.

Worcester State University Political Scientist Anthony Dell'Aera believes both courses of action seem unlikely at this point.

Dell'Aera said, "Given the timeline, Congress could in effect run out the clock on the president in this matter."

Hindman does believe there is still a chance impeachment goes through, saying: "Impeachment doesn't have to be drawn out. And if it has teeth, and there's a clear violation of power, I think you go as fast as you can."

The Trump presidency will be over in a little more than a week.

And one question in Washington is: can the president pardon himself?

Dell'Aera said, "It would, of course, be unprecedented. Legal scholars are skeptical about whether this would ever hold up in court."

Hindman said, "When the judges would apply it, they may look at a self-pardon as beyond the scope of what constitutional lawyers and the intention of the framers when they wrote the clause, they didn't anticipate a president."

The House has scheduled a vote for Tuesday to urge Vice President Mike Pence to invoke the 25th Amendment. A vote on the article of impeachment is scheduled for Wednesday morning. But, the president's term ends January 20.