Krystal Ball: Biden more vulnerable than he appears

Hill.TV host Krystal Ball said Thursday that former vice president and 2020 front-runner Joe BidenJoe BidenTrump endorses challenger in Michigan AG race On The Money: Democrats get to the hard part Health Care — GOP attorneys general warn of legal battle over Biden's vaccine mandate MORE could be more vulnerable than the polls suggest.

“No one has less business being the frontrunner and yet there he is,” Ball said. “Challenging voters to push up contests, bumbling through sleepy time ‘rallies’ and promising the wealthy that on his watch, ‘nothing will fundamentally change’ and hanging out at the top of the polls the whole time.”

“On Monday, I made the case that Biden, whose support has consistently hovered between 25 and 28 percent, could, in fact, be vulnerable,” she added.

Though Biden has fallen behind in some early state primary polls, Biden has consistently lead the crowded Democratic field throughout the race.

According to the RealClearPolitics Average of national polls, the former vice president boasts a 9-point lead over his closest competitor in the race, Sen. Bernie SandersBernie SandersBriahna Joy Gray: Push toward major social spending amid pandemic was 'short-lived' Sanders 'disappointed' in House panel's vote on drug prices Manchin keeps Washington guessing on what he wants MORE (I-Vt.). Biden has 28 percent support compared to Sanders’s 19 percent. Sen. Elizabeth WarrenElizabeth WarrenFederal Reserve officials' stock trading sparks ethics review Manchin keeps Washington guessing on what he wants Warren, Daines introduce bill honoring 13 killed in Kabul attack MORE (D-Mass.), meanwhile, comes in third with 15 percent followed by South Bend, Ind., Mayor Pete ButtigiegPete ButtigiegLGBT film festival to premiere documentary about Pete Buttigieg Pete and Chasten Buttigieg welcome twins Coalition urges Democrats to restore billion in transit funding MORE at 8 percent.

Biden is poised to take part in the sixth Democratic debate Thursday night, where he will appear alongside six other candidates.

The debate, which is sponsored by PBS Newshour and Politico, is set to take place at Loyola Marymount University in Los Angeles.