Dems to introduce measure blocking Trump's emergency declaration

House Democrats are slated to introduce a privileged resolution as soon as Friday in an effort to stop President TrumpDonald John TrumpDavid Axelrod after Ginsburg cancer treatment: Supreme Court vacancy could 'tear this country apart' EU says it will 'respond in kind' if US slaps tariffs on France Ginsburg again leaves Supreme Court with an uncertain future MORE's national emergency declaration to build a barrier along the southern border, according to a Democratic aide.

Congressional Hispanic Caucus Chairman Joaquin CastroJoaquin CastroThe exhaustion of Democrats' anti-Trump delusions Juan Williams: Democrats finally hit Trump where it hurts Texas Democrats tap Joaquin Castro to deliver key address MORE (D-Texas) is leading the efforts on the measure, which was first reported by The Associated Press. The resolution has reportedly garnered the support of 90 Democratic co-sponsors. It's less likely to see movement in the Republican-controlled Senate.

Speaker Nancy PelosiNancy PelosiPelosi asks Democrats for 'leverage' on impeachment Is there internet life after thirty? Pelosi says Dems 'have to be ready to throw a punch — for the children' in 2020 MORE (D-Calif.) is backing the Castro resolution and urging colleagues to support it.

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Trump declared a national emergency on Friday to reallocate billions of dollars to fund construction of a barrier at the U.S.-Mexico border. Lawmakers provided $1.375 billion in funding for border fencing as part of the massive spending bill passed by Congress last week.

The move to declare a national emergency for additional border funding was met with strong pushback from Democrats as well as some Republicans, who argued it was a power grab by the president after he failed to secure the money in negotiations with congressional leaders.

Sixteen states have joined a lawsuit filed this week against the emergency declaration.

-Updated 8:30 p.m.