In the battleground state of Arizona, volunteers like Lucia Salinas are hitting the pavement canvassing for votes.
The 2020 election will be very personal for her.
Salinas lost her job working as a cook for 18 years at Sky Harbor Airport Phoenix, due to the pandemic.
The mother of six is without a salary and she has also lost her medical insurance.
That's led to more anxiety, she's diabetic and can't afford her medication.
"I had to go to the alleys and pick up metal, trash so I can get some money. And I felt like homeless. And that pissed me off. On top of that, I didn't have enough money for medication. Where I feel like my mom had to share medication with me."
Salinas feels she's been let down by U.S. President Trump and his handling of the coronavirus.
She says she wants him out.
"I want to go knock doors. We need to keep this person out. We need to change our government here in Arizona. We need to put more people in the city of Phoenix that they care about family and workers. I just feel like I need to fight, who is right now sitting in that White House."
While Donald Trump won Arizona by only 4 points in 2016, a recent Reuters/Ipsos opinion poll showed Trump closely trailing Biden in the Grand Canyon State.
One demographic will be key to victory there: Latinos.
Joseph Garcia is the executive director of Chicanos por la Causa Action Fund:
"This may be the election that shows once and for all that you cannot win an election without the Latino vote. If the turnout is great, that statement is going to be true. And I see a lot of shifting. I see perhaps the Republican party dropping the hard immigration stance, realizing they can't win an election without Latinos."
Even with those poll numbers, Biden is up against history.
Arizona hasn't voted for a Democrat for president since 1996.