Open this photo in gallery: An attendee listens as former U.S. President Donald Trump speaks at a campaign rally, on Dec. 16, in Durham, N.H.Reba Saldanha/The Associated Press Negotiators rushed to reach a U.S. border security deal Sunday that would unlock President Joe Biden’s request for billions of dollars worth of military aid for Ukraine and other national security needs before senators leave town for the holiday recess. The Biden administration, which is becoming more deeply involved in the talks, is facing pressure from all sides over any deal. The administration and Senate negotiators had hoped to reach a framework...