Federal funding for Maryland’s Purple Line is in jeopardy, as are Metro’s hopes for a significant increase in money from the government under President Trump’s proposed 2018 budget released Thursday. Trump’s proposed spending plan, which slashes the federal transportation budget by 13 percent, also curbs long-distance Amtrak service out of Washington and cuts millions in federal grants that the region’s governments have relied on for new rapid bus lines, road work, bus stop improvements and bike paths. The cuts came as a shock to many, considering Trump’s campaign pledge to pump $1 trillion into the nation’s crumbling infrastructure. “I find...