The victory of Republican candidate Donald Trump in Tuesday's presidential election over Democratic rival Hillary Clinton had surprised many prognosticators. But Allan Lichtman, a Washington, D.C.-based professor said that he was not surprised. For Lichtman, Trump's victory has been sealed due to the premise of the election that focused mainly on the performance of the party in power.

According to Lichtman, an American political historian, and professor of history who teaches at American University, Donald Trump will not last in his office and is facing an impeachment by a Republican Congress that favors Trump's running-mate, Mike Pence.

Lichtman shared to the "Washington Post," that his prediction is based on gut. He is quoted saying "They don't want Donald Trump as president, because they can't control him. He's unpredictable. They'd love to have Pence -- a down-the-line, conservative, controllable Republican." He stresses his certainty that Trump's impeachment will be grounded on doing something that endangers national security.

Lichtman is popular for correctly predicting the correct outcome of every U.S. presidential elections since 1984. He failed to predict former U.S. President George W. Bush's win over Al Gore, who won the popular vote like Hillary Clinton in 2016. He authored the book "Predicting the Next President: The Keys to the White House 2016" which developed a historically based system of keys to predicting election results.

Lichtman's prediction is supported by the "New York Times'" David Brooks who sees an impeachment scenario for Donald Trump sometime within the next year. Brooks highlighted the need to denounce Trump's bigotry, dishonesty, and promise-breaking. He called for a third political party that is social or open.

Lichtman's presidential predictions use 13 true-false questions. The professor criticized polls as "snapshots that stimulate an election." He considers poll analyst Nate Silver as only a clerk, not a scientific analyst.