Booker's campaign announced Tuesday that the vice president will not appear at a Friday event for the candidate in New Jersey.
Biden had planned to make a stop in the state to help boost Booker's campaign just five days before Election Day. Though the Democrat is still favored in the special election to replace deceased Sen. Frank Lautenberg (D-N.J.), multiple polls in recent weeks have shown his Republican opponent, Steve Lonegan, to be closer than expected.
Biden has already hit the trail for other candidates this cycle, making a stop in Massachusetts for then-candidate Edward MarkeyEd MarkeyTim Kaine backs call to boost funding for Israeli missile defense FCC chief pushes phone companies to offer free robocall blocking Markey floats bill bringing internet to developing world MORE (D). He also has a fundraiser planned for Sen. Kay HaganKay HaganDemocratic National Convention event calendar 10 Senate seats most likely to flip in 2016 Senate Republicans are feeling the 'Trump effect' MORE (D-N.C.) later this month.