John: Joe Biden is narrowing his list of contenders to be his vice president – and he just set a date for finally announcing his pick. 

His historic decision could determine the FIRST woman vice president and make or break our chances of defeating Donald Trump in November. This officially puts us in a sprint toward Election Day. 

With so much on the line, we're conducting a poll of highly qualified Democrats to see which leader should join Biden's ticket – and your name is on that list. But the selection process is wrapping up quickly, CNN says that Biden's making his choice ANY day now – so we need you to tell us before this poll expires at 11:59 p.m. tonight: 

Right now, NPR is reporting that Elizabeth Warren and Kamala Harris are Biden's top contenders – but with Election Day fewer than 100 days away, polling is still massively shifting. Biden choosing the right running mate is critical to a strong ticket and taking back the White House, John. That's why we're reaching out to a small sample of our top supporters from across the country to find out who the grassroots choice is.

But we can only keep this poll open until midnight tonight – and we still need another 31 responses from xxxxxx to reach statistical significance. We haven't heard from you, and time is running out before Joe Biden makes his announcement. Please, tell us right away, John:

Who's your top pick for the first woman vice president?

**Deadline for consideration: 11:59 p.m. tonight. Late responses cannot be considered.