Senate Minority Leader Chuck Schumer, a Democrat from New York, speaks during a news conference after a Democratic conference meeting at the U.S. Capitol in Washington, D.C., U.S., on Tuesday, March 5, 2019. Senate Republicans must decide whether to stop President Donald Trump from using an emergency declaration to pay for his border wall, and support from just four GOP members might be enough to send him a measure blocking his plan. Photographer: Andrew Harrer/Bloomberg via Getty Images