WASHINGTON — Democrats ignored a veto threat and rammed legislation through the House Tuesday that would stymie President Donald Trump's bid for billions of extra dollars for his border wall, escalating a clash over whether he was abusing his powers to advance his paramount campaign pledge.

The House's 245-182 vote to block Trump's national emergency declaration fell well below the two-thirds majority that would be needed to override his promised veto. Top Republicans worked to keep defections as low as possible — 13 backed the Democrats' resolution — underscoring their desire to avoid a tally suggesting that Trump's hold on lawmakers was weakening.

The vote also throws the political hot potato to the Republican-run Senate, where there were already enough GOP defections to edge it to the cusp of passage. Vice President Mike Pence used a lunch with Republican senators at the Capitol to try keeping them aboard, citing a dangerous crisis at the border, but there were no signs he'd succeeded.

"I personally couldn't handicap the outcome at this point," said Senate Majority Leader Mitch McConnell, R-Ky., who's planning a vote within the next three weeks. He even said Republicans remained uncertain about the legality of Trump's move, telling reporters, "We're in the process of weighing that." Senate passage would force Trump's first veto, which the House vote demonstrated that Congress would surely fail to overturn. But the showdown was forcing Republicans to cast uncomfortable votes pitting their support for a president wildly popular with GOP voters against fears that his expansive use of emergency powers would invite future Democratic presidents to do likewise for their own pet policies.

House Republicans who joined all voting Democrats to support the Democratic resolution included moderates from competitive districts like Fred Upton of Michigan and libertarian-leaning conservatives like Thomas Massie from Kentucky.

The White House wrote to lawmakers formally threatening to veto the legislation. The letter said blocking the emergency declaration would "undermine the administration's ability to respond effectively to the ongoing crisis at the Southern Border."

Republicans said Democrats were driven by politics and a desire to oppose Trump at every turn, and said Trump had clear authority to declare an emergency to protect the country. They also defended the president's claims of a security crisis along the boundary with Mexico, which he has said is ravaged by drug smugglers, human traffickers and immigrants trying to sneak into the US illegally.

Trump has asserted that barriers would stop drugs from Mexico from entering the US In fact, government figures show that 90 percent of drugs intercepted from Mexico are caught at ports of entry, not remote areas where barriers would be constructed.

AP