Post Office warns Pennsylvania it can't "keep up" with mail-in ballots by the deadlines ... and the PA Secretary of State has proposed a rule change in response.

"The United States Postal Service has informed Pennsylvania officials that mail delivery won't be able to keep up with state election deadlines, setting up a scenario where votes might not be counted even if they are mailed and postmarked by the deadline due to delivery delays, the Philadelphia Inquirer reported." (The Blaze)

• What's happening: The Pennsylvania Secretary of State has submitted a proposed rule change for mail-in ballots to the Pennsylvania State Supreme Court (not the Supreme Court).

If it's approved, mail-in ballots can be accepted until the Friday after the presidential election, provided they are postmarked by Election Day. Current rules require ballots to be received the night of Election Day.

• What's at stake: Pennsylvania is a key swing state, and any last-minute rule change (remember: we're less than 100 days from Election Day!) could have big impacts on the presidential election.

(1) This could be the sign of bigger issues to come (and not just in Pennsylvania!). The logistical concerns of the U.S. Postal Service handling a large influx of absentee ballots have been shared before.

CBS News did an investigation to simulate a mail-in ballot election ... and the results weren't good. Check out their video here.

(2) We may see a legal challenge if the rule change goes through. Both the Democratic and Republican national parties -- as well as outside groups -- have paid close attention to rule changes this year.

Remember: it was just yesterday that the U.S. Supreme Court ruled on the GOP challenge to Rhode Island's change to absentee ballot procedures.

(3) This is more evidence that the results of the presidential election may be delayed. As you'll remember from The Vote earlier this week, FEC Commissioner Ellen Weintraub has said there's a "substantial chance" we won't know who won on Election Day.

• What else to know: Law professor Justin Levitt has been keeping a running list of many election-related lawsuits in the US ahead of the 2020 election. As of his update yesterday, it was 198 cases in 43 states plus the District of Columbia. Check out his list here.

What to expect from the Democratic National Convention, which starts on Monday.

"Democratic National Convention organizers announced Friday a list of musical acts expected to be featured at the party’s four-night nominating event next week. Among the artists slated to perform at the largely virtual convention in Milwaukee are Leon Bridges, The Chicks, Common, Billie Eilish, Jennifer Hudson, John Legend, Billy Porter, Maggie Rogers, Prince Royce and Stephen Stills." (POLITICO)

• What's happening: Because we've shared the full schedule of the Democratic National Convention with you before (check it out here from the DNC website), we wanted to add a light-hearted addition as it is Friday: the musical acts! You can see the list above.

The Democratic National Convention will run from Monday to Thursday next week with TV broadcasts of the major speeches each evening.

Now here is a selection of the high-profile speeches you can expect on Monday night:

-- Sen. Amy Klobuchar, who dropped out of the presidential primary and endorsed Biden

-- Governor Gretchen Whitmer, who reportedly was a top contender for VP

-- Senator Bernie Sanders

-- Former First Lady Michelle Obama

• What's at stake: And here are the two big questions we have heading into Monday night's convention kick-off.

(1) How enjoyable and exciting is a virtual convention? This is a first (for both parties!), and it had to be planned on short notice too. Normally convention speeches are exciting due to the energy and reaction of the crowd -- not to mention the balloon drops!

So we want to know how enjoyable and exciting virtual coverage is because that will determine how many Americans tune in.

(2) What does Bernie Sanders say in his speech? Rep. Alexandria Ocasio-Cortez (AOC) was restricted to a 60-second, pre-recorded video. But Sanders has a longer timeslot -- likely because he has openly called for party unity, even while his supporters try to push the Democrats to the extreme left.

What will he use his convention time to say, and will his supporters listen? If Sanders' supporters don't turn out for Biden in November, he'll be in big trouble at the polls.

• What else to know: Plans for the Republican National Convention continue too; it will now be centered on Washington, D.C.

Get ready for Secretary Clinton ... again? Hillary Clinton said she'd be happy to serve in a Biden Administration.

"2016 Democratic presidential nominee Hillary Clinton said in an interview published Thursday she is open to serving in a potential Biden-Harris administration next year. 'I’m ready to help in any way I can because I think this will be a moment where every American – I don’t care what party you are, I don’t care what age, race, gender, I don’t care – every American should want to fix our country,' Clinton said in an interview with 19th News." (The Federalist)

• What's happening: No wonder the Democratic National Convention feels like 2016 all over again: Hillary Clinton wants to remain in the headlines. In a recent interview, she said she'd be happy to serve in a Biden Administration.

• What's at stake: Welcome to another day of deep division in the Democratic Party. (And we're not just talking about the progressive "convention rebellion," which now includes one Member of Congress saying he'll vote against the party platform!)

While many of the party activists have moved to support the far-left progressives, the party "establishment" -- which includes Joe Biden and both Clintons now -- wants to re-live 2008 to 2016 over ... and over ... and over again.

This won't help Joe Biden's campaign this fall as he tries to balance appealing to Bernie Sanders' supporters enough to get out their vote without losing moderate voters in the November election.

• What else to know: In one of the odder moments of the 2020 election, don't forget that Hillary Clinton started her own podcast series.

Dr. Fauci says Americans can vote safely in-person.

"One of the most highly contentious issues of the 2020 presidential cycle is whether it will be safe for Americans to vote in person on November 3, 2020. [...] But according to Dr. Anthony Fauci, an original member of President Trump's Wuhan Coronavirus Taskforce, voting in person can be done safely." (Townhall)

• What's happening: Amid debates about the safety of voting in-person this fall (and the increased interest in mail-in voting instead), Dr. Fauci has weighed in.

In a video clip published by ABC, he said it would be safe to vote "if carefully done according to the guidelines," like how Americans grocery shop right now.

• What's at stake: This could influence state debates over how to balance in-person and mail-in voting. But we say "could" because we think much of the debate -- and resulting actions -- are already in motion.

There are just 81 days left until Election Day 2020 ... and far fewer before Americans begin voting early in some states! We'll keep you posted as it continues to develop.