House Democratic leaders are urging their members to oppose the stopgap spending bill Republicans plan to bring to the floor on Tuesday, according to aides and lawmakers. This raises the likelihood that the government could shut down on March 14.

Republicans in the House released a stopgap spending plan over the weekend that would delay a government shutdown for at least six months, but it's unclear if they have the votes to pass the measure.

While conservative House Republicans have in the past dug in and opposed such spending bills, forcing Mr. Johnson to rely on Democrats to keep the government open, President Trump called on Republicans to unite and push this measure through so he and Republicans on Capitol Hill could focus on their new budgetary and tax-cutting plans.