Joe Biden racked up three more big primary wins Tuesday, but Bernie Sanders refused to concede despite having no path to the 2020 Democratic presidential nomination.

After polls closed in Arizona, Illinois, and Florida, roughly half of the delegates up for grabs this cycle were allocated. And the Vermont senator’s ability to amass the 1,991 delegates needed for the right to challenge President Trump in the general election looks practically impossible unless the trajectory of the race turns 180 degrees.

Recommended Stories

Biden Michigan win makes clear Sanders appeal in 2016 was part anti-Clinton: Latest primary updates

Sanders to ‘assess his campaign’ after sweeping primary losses

What Buttigieg’s pre-Super Tuesday exit means for the Democratic primary field