"The path toward victory is virtually impossible," Sanders said in a livestreamed speech to supporters from his hometown of Burlington, Vermont.
"I have concluded that this battle for the Democratic nomination will not be successful.
And so today, I am announcing the suspension of my campaign." The 78-year-old U.S. senator from Vermont, a democratic socialist whose progressive agenda pulled the party sharply to the left, shot to an early lead in the Democratic race.
But he faded quickly after losing South Carolina in late February as moderate Democrats consolidated their support behind Biden.
The departure of Sanders, the last remaining rival to Biden, sets up a race between the 77-year-old former vice president and Trump, 73, who is seeking a second four-year term in office.