Michigan Secretary of State Jocelyn Benson is estimating record turnout in this year's election, as more than 3 million Michigan voters have requested their ballots and over half of those voters have already returned them -- surpassing expectations with still two weeks until Nov. 3.

Looking ahead to the next two weeks, Benson told reporters Tuesday morning she is cautioning voters against using the mail due to potential postal delays, instead encouraging them to rely on drop boxes and hand delivering ballots to clerks offices to ensure their ballots meet the Election Day deadline.

There is currently a legal dispute in Michigan over the deadline for accepting mail ballots, with the Michigan Court of Appeals late last week blocking a lower court's order that extended the deadline for absentee ballots to arrive by two weeks.

-ABC News' Kendall Karson

First lady Melania Trump is no longer traveling with the president to Pennsylvania Tuesday, with her office citing a "lingering cough."

"Mrs. Trump continues to feel better every day following her recovery from COVID-19, but with a lingering cough, and out of an abundance of caution, she will not be traveling today," the first lady's chief of staff and spokesperson Stephanie Grisham said in a statement.

Tuesday's campaign visit to Pennsylvania was supposed to have been the first lady's first public appearance after contracting COVID-19.

Tuesday's event would have been the first lady's first rally appearance in over a year. She last joined Trump on stage at his reelection kickoff in Orlando in June 2019.

-ABC News' Jordyn Phelps and Will Steakin

The United States Postal Inspection Service, the law-enforcement arm of the Postal Service, this month issued a bulletin to local, state and federal law-enforcement agencies around the country warning them to be mindful of threats to postal workers and the mail because of the controversy surrounding mail-in ballots for the Nov. 3 election.

“The intense media focus and public awareness surrounding these mail-in ballots could potentially make USPS employees and vehicle a tempting target for criminal activities,” the one-page Oct. 7 bulletin said. It goes on to list a series of possible threats including assaults of USPS personnel and general mail theft, among other concerns.

The bulletin comes as the president continues to sow doubt in the integrity of the mail-in ballot process.

-ABC News' Josh Margolin

When Sen. Kamala Harris, D-Calif., took part in an interview on a South Florida radio show called "Caribbean Riddims," she sprinkled the Jamaican phrase "ya mon" throughout the interview with a heavy hand.

The Democratic vice presidential nominee is the daughter of Jamaican and Indian immigrants and playing up her Jamaican heritage is a huge part of the Biden-Harris campaign's outreach to Afro-Caribbean voters in the Sunshine State.

The voting bloc is significant in Florida, especially in South Florida and along the critical I-4 corridor, a bellwether in this battleground state. According to the Migration Policy Institute, 41% of the nation's 4.4 million Caribbean immigrants live in Florida, and Miami-Dade County has the highest number of Caribbean immigrants in the U.S. with 862,000 Caribbean immigrants calling it home. If the campaign's outreach to this community is successful, it could help turn the state into an electoral victory for Biden and Harris.

-ABC News’ Averi Harper

With just two weeks until voters cast their final ballots, former Vice President Joe Biden’s campaign is launching a new ad, “I Can’t,” focused on a small business owner in Arizona -- a state the former vice president is hoping to turn blue on Election Day.

“I can’t do another four years of this. I—I can’t,” Maggie, a hair salon co-owner from Phoenix, Arizona, says in the ad. ”There’s never been more divisiveness in this country. It’s frightening and sad.”

In her testimonial, Maggie takes aim at Trump on his signature issue of the economy, particularly amid the COVID-19 pandemic.

“That was Trump’s whole thing, you know -- take the politics out of it and run it like one of his businesses. I know people were looking for that kind of change, but it’s not working,” she said.

“We’ve only gotten more in debt, we have this virus now out of control, people out of work, no healthcare. How is that helping people?” Maggie continued, echoing arguments Biden has taken up against Trump on the trail.

The ad continues similar messaging from another recent ad from Biden’s team, focused on a bar and music venue owner in Michigan hurting from the coronavirus outbreak, and comes one day after the president held two rallies in Arizona, a state he carried by nearly four points in 2016.

However, recent Arizona state polling shows Trump now trailing Biden significantly in the state the former vice president’s team has identified as an expansion opportunity in their path to 270 electoral votes.

The ad is slated to run nationally during cable programming, as well as in key battleground states, including Arizona, Florida, Georgia, Iowa, Michigan, Minnesota, Nebraska, Nevada, New Hampshire, North Carolina, Ohio, Pennsylvania and Wisconsin.

In the final two weeks until Election Day, the Biden campaign, the Democratic National Committee and pro-Biden outside groups are slated to outspend Trump and pro-Trump efforts on Television and radio ads.

According to ad spending data from media research firm CMAG, Biden and pro-Biden groups have reserved a total of $147 million in airtime from Tuesday through Nov. 3.

-ABC News’ Molly Nagle