Conservative political columnist Ann Coulter criticized President Donald Trump in an interview Wednesday, saying she would not vote for his re-election in 2020 -- and predicting he might not finish out his term -- unless he follows through on a plan to build a border wall between the United States and Mexico.

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Coulter, who has clashed with Trump over the wall in the past, told The Daily Caller that without the wall, the linchpin of his 2016 presidential campaign, Trump will "just have been a joke presidency who scammed the American people, amused the populist for a while, but he'll have no legacy whatsoever."

"My prediction is his support will evaporate and Trump will very likely not finish his term and definitely not be elected to a second term," Coulter told The Daily Caller.

After Coulter's comments went public, either Trump or someone who handles his Twitter account apparently unfollowed her on the social media platform, The New Republic reported. In a tweet, CNN media correspondent Brian Stelter made the same observation, noting that within an hour after Coulter's comments aired on Fox News, a Trump bot tweeted the president had unfollowed Coulter on Twitter.

Trump, who makes extensive use of Twitter, tweeted earlier Wednesday that "One way or another, we will win on the wall."

GoFundMe page supporting Trump and the border wall was started Dec. 16 by Brian Kolfage, a triple amputee and Purple Heart recipient who was severely injured during his deployment in Iraq in 2004, according to his website.

Kolfage set a goal of $1 billion, and after three days more than $2.5 million had been pledged by more than 42,000 people to the cause, dubbed "We The People Will Fund The Wall."