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 MarkeyOvernight Energy: Obama drinks Flint water during visit New House caucus will help keep hackers out of cars Overnight Tech: Email privacy bill gets its day MORE (D). He also has a fundraiser planned for Sen. Kay HaganKay Hagan10 Senate seats most likely to flip in 2016 Senate Republicans are feeling the 'Trump effect' Washington's lobby firms riding high MORE (D-N.C.) later this month.