Judge Jeanine: 'It's Time to Take Our Country Back'

Mom Whose Daughter Was Killed by Illegal Immigrant: 'The Ball's Been Dropped'

Stacey Dash Rips Hollywood 'Hypocrites' Pushing Gun Control

George Will announced this weekend that he has left the Republican Party because of presumptive GOP presidential nominee Donald Trump.

Will told The Washington Post that he changed his Maryland voter registration from Republican to "unaffiliated" earlier this month, adding that he doesn't know who he will be supporting in the 2016 race, but he knows it won't be Trump.

On "Fox News Sunday" today, Will made his first on-air comments about his decision to leave the GOP.

He explained that he joined the party because he's a conservative, and he left it for the exact same reason.

"The long and the short of it is, as Ronald Reagan said when he changed his registration, 'I did not leave the Democratic Party, the Democratic Party left me.'"

After Will announced he was leaving the party, Trump took to Twitter to blast the "overrated" pundit:

Will delivered a biting response to Trump's tweet, quipping, "He has an advantage on me, because he can say everything he knows about any subject in 140 characters and I can’t."

Watch more from "Fox News Sunday" above.

Your Smartphone Could Be Harmful to Your Health...

Melissa Rivers Speaks Out About Mother's Death, Medical Malpractice Lawsuit

26 Democrats Who Participated in Gun Control Sit-In Are Gun Owners