WASHINGTON—Lawmakers start a year-end sprint this week to keep the government running, provide more coronavirus aid and pass an annual defense bill, with President Trump’s focus on challenging his election loss injecting more uncertainty into the legislative outcome.
As the pandemic surges nationwide, Democratic and Republican leaders are under increasing pressure from rank-and-file lawmakers to agree on some Covid relief, prodded in part by the looming expiration of aid provisions from bills passed earlier this year. Those…