WASHINGTON — A growing number of Democrats are sitting out Donald Trump’s inauguration, buoyed by the President-elect’s feud with Rep. John Lewis.

At least 18 Dems will boycott Friday’s swearing in ceremony, according to Politico’s count, including a number of New York Dems — Reps. José Serrano, Nydia Velazquez, Adriano Espaillat, Jerrold Nadler and Yvette Clarke.

“I will NOT attend the inauguration of @realDonaldTrump. When you insult @repjohnlewis, you insult America,” Clarke tweeted. “Cowardly @realDonaldTrump isn’t fit to polish hero @repjohnlewis’s boots.”

The movement to reject Trump is led by Lewis who said Friday he won’t be attending inauguration because he doesn’t believe Trump is a “legitimate” president.

After Trump hit back hard against the civil rights icon, a number of Dems announced they will join the boycott under the social media hashtag #IStandWithJohnLewis.

Vice President Elect Mike Pence called Lewis’ statements “deeply disappointing” Sunday and urged critics to reconsider.

“I hope that John Lewis and some others who have joined his plans to take a pass on the inauguration will rethink that and will be with us and celebrate this extraordinary moment in the life of our nation and the life our democracy,” Pence told Fox News Sunday.

Lewis told NBC’s “Meet the Press” that Trump would not be welcomed by him to March in Selma, Ala. to commemorate civil rights.

“I would not invite him to come,” said Lewis, who led historic marches to Montgomery in 1965.

“Well, by going to Selma, like President Bush, President Clinton, President Obama, maybe he would learn something. Maybe he would get religion,” added Lewis. “I wouldn’t try to do anything to prevent him from coming.”

Trump retaliated over the weekend on Twitter that the legendary civil rights who was beaten to secure civil rights is “all talk.”

“Congressman John Lewis should spend more time on fixing and helping his district, which is in horrible shape and falling apart (not to mention crime infested) rather than falsely complaining about the election results,” Trump tweeted. “All talk, talk, talk – no action or results. Sad!”

After much criticism from Atlantans that Trump is clueless to its thriving neighborhoods, Trump changed his geographic target in another tweet.

Trump said Lewis should focus on “the burning and crime infested inner-cities of the U.S.” and he added “I can use all the help I can get!”