Amid calls from Democrats for increasing the number of justices on the Supreme Court, Alan Dershowitz warned such a move would further politicize the nation's highest court.

Some presidential candidates -- including Elizabeth Warren, Kamala Harris, Kirsten Gillibrand and Beto O'Rourke -- have expressed support for expanding the Supreme Court beyond nine justices.

In response, Republican lawmakers announced Tuesday that they would be introducing a constitutional amendment this week that would limit the number of justices to nine -- the number it has been since 1869.

On "America's Newsroom" Wednesday, the Harvard Law professor emeritus said expanding the Supreme Court would be a "terrible idea."

"The highest court is supposed to be a neutral, objective, non-partisan institution," Dershowitz said.

He acknowledged that both Republicans and Democrats have tried to use the Supreme Court to their advantage, and the American people should demand that both parties leave politics out of the Supreme Court.

"Both parties are at fault. The Republicans are at fault for not letting Merrick Garland's nomination come to the floor. The Democrats are at fault for the way they treated President Trump's nominees to the Supreme Court," Dershowitz said.

He said the number of Supreme Court justices should remain at nine, but he is open to amending the Constitution to create term limits for Supreme Court justices, as the Founding Fathers did not envision individuals sitting on the high court for decades and decades.

See more from Dershowitz above.

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