Senate minority Leader Mitch McConnell leaves the Senate floor in Washington. Democratic and Republican leaders in the Senate were close late last night to an agreement that would increase the nation’s borrowing authority and provide enough money to operate the government until the end of the year. Photograph: Gabriella Demczuk/The New York Times

US Senate leaders are poised to reach an agreement as early as today to bring a halt to the fiscal standoff, and now must race the clock to sell the p(...)