Joe Biden is winning the Presidential race, as per the different polls suggest that he continues to remain ahead of Donald Trump in several key states. However, the Biden campaign believes that it is not the time to be too happy about it and become complacent.

Therefore, all Biden supporters have been requested not to become complacent, especially since the presidential elections are only a few weeks away.

"The very searing truth is that Donald Trump can still win this race, and every indication we have shows that this thing is going to come down to the wire," Biden campaign manager Jen O'Malley Dillon mentioned in a memo that was addressed to supporters of the former vice president.

"The reality is that this race is far closer than some of the punditry we're seeing on Twitter and on TV would suggest," he wrote. "In the key battleground states where this election will be decided, we remain neck and neck with Donald Trump."

O'Malley further added in the memo how Trump won the Electoral College even though the polls showed Hillary Clinton as the favorite and likelier to win the presidential race.

"If we learned anything from 2016, it's that we cannot underestimate Donald Trump or his ability to claw his way back into contention in the final days of a campaign," O'Malley told Biden supporters.

According to polls, Biden is leading by several percentage points in key states, including Pennsylvania, Michigan and Wisconsin. He is expected to lead by small margins in a few other states such as North Carolina and Florida.

During his campaign in North Carolina over the weekend, Biden reminded his supporters that early voting has already begun.

Vice President Joe Biden U. S. Vice President Joseph Biden speaks during a memorial service for the late former Israeli president Shimon Peres at the Adas Israel Congregation October 6, 2016 in Washington, DC. Getty Images