"White House and Senate in Urgent Border Deal Race, Shifting Immigration Politics"

White House and Senate negotiators are racing against time to reach a border deal before the holidays, with Ukraine aid hanging in the balance. President Biden has urged Congress to pass his national security supplemental request, which includes funding for Ukraine, Israel, and border security. However, negotiations have stalled as Republicans insist on tying tighter immigration restrictions to funding for Ukraine. If a deal is not reached, the White House will have to make tough choices regarding US military readiness and supplying allies like Ukraine. Key sticking points include metrics for expelling migrants, curbing parole, and mandatory detention. The politics are complicated for Biden, as losing support from the Democratic base or being perceived as doing nothing on border security could have lasting implications.