Democrats believe they have set the stage to block President Trump’s legislative priorities for years to come by winning major concessions in a spending bill to keep the government open. House Minority Leader Nancy Pelosi (D-Calif.) and Senate Minority Leader Charles E. Schumer (D-N.Y.) secured nearly $5 billion in new domestic spending by exploiting disagreements between President Trump and GOP lawmakers over spending priorities. Democrats’ lopsided victory on the five-month deal, which is likely to be approved this week, means it will be very difficult — if not impossible — for the GOP to exert its will in future budget...