Republicans in the House on Thursday urged House Republicans to vote to approve President Donald Trump’s first-term border wall with Mexico despite an expected veto threat from Democratic leaders.

House Majority Leader Kevin McCarthy (R-Calif.) warned Thursday that House Republicans were facing a “very real risk” of a veto threat on the $1.6 trillion bill, which would finance a wall along the U.S.-Mexico border, and urged lawmakers to pass it, according to an aide.

Trump, who is seeking to keep a majority of his Republican-controlled House in next year’s election, has signaled that he would veto the bill.

House Minority Leader Nancy Pelosi (D-Calif.), a leading Democrat, said the border wall is “the first step” toward ensuring Trump is not reelected, adding that Democrats will work with Republicans on a border wall and other immigration measures.

“It’s not just about the wall.

We’re talking about how to keep families together, how to help vulnerable immigrants, how do we address the drug crisis, and so on,” Pelosi told reporters.

“And so this is an opportunity to do something to make sure that the president is not elected, and I believe he will be, because he will continue to push for the wall.”

House Republicans have voted more than once on Trump administration priorities, such as the border security plan and a border tax that Trump signed last month.

Trump has vowed to veto any such legislation.