More than 58 million Americans have already voted

Five individuals in Vice President Mike Pence's orbit have tested positive for the coronavirus, including his chief of staff Marc Short and political aide Marty Obst.

Devin O'Malley, press secretary for the vice president, announced Saturday in a statement that Short tested positive.

Sunday morning, multiple sources familiar with the matter told ABC News that in addition to an outside political ally of Pence's four of his staffers have tested positive. One senior-level source stressed that the three of the staffers have been quarantining since the middle of this past week.

O'Malley said both Pence and wife Karen Pence tested negative for the virus on Saturday and a pool report indicated they tested negative again on Sunday morning. The vice president is still expected to travel to North Carolina later on Sunday to speak at a rally in Kinston.

-ABC News' John Santucci and Katherine Faulders

ABC News Chief Justice correspondent Pierre Thomas said Russia appears to be "seeking direct access" to American voters to sow division and unrest.

Senior national security officials alerted the American public Wednesday that Iran and Russia have both obtained voter data in their efforts to interfere in the 2020 U.S. election.

Thomas said on ABC's "This Week" Sunday that those efforts appear to be aimed at creating problems before the election and possibly just after Election Day "if we don't quickly know a result."

On Friday, U.S. officials told ABC News that systems containing election-related information from two counties in two separate states were successfully hacked by the Russian effort. While the FBI and Cybersecurity and Infrastructure Security Agency have seen no evidence that data has been altered, FBI and Homeland Security officials expressed concern that Russia "may be seeking access to obtain future disruption options, to influence U.S. policies and actions, or to delegitimize SLTT government entities."

Iran is "aggressively pursuing the same goal," Thomas said Sunday.

Director of National Intelligence John Ratcliffe said Wednesday that Iran was separately behind a series of threatening emails that were found to be sent this week to Democratic voters, which he said was "designed to intimidate voters, incite social unrest and damage President Trump."

Alireza Miryousefi, spokesman for the Iranian Mission to the U.N., denied the allegations to ABC News.

ABC's "This Week" Co-anchor Martha Raddatz talked with voters from the battleground state of Pennsylvania, a must-win for Trump.

The president won the state in 2016, with a slim margin, and there are "worrisome signs" this year.

Tanya Siletsky is the kind of supporter the Trump campaign hopes will help him win the battleground state.

"I would say no," she said on "This Week" on whether anything has given her pause about Trump. "All his policies I agree with 100%."

6:53

Six for the Win: Pennsylvania voters share their thoughts ahead of the election

"This Week" co-anchor Martha Raddatz traveled to Pennsylvania to speak with voters less than two weeks before the 2020 election.

ABCNews.com

After two contentious debates and more than $1.5 billion in advertising, President Donald Trump and former Vice President Joe Biden enter the closing week of a bitter campaign with their favorability ratings relatively unchanged since at least the summer, according to an ABC News/Ipsos poll released Sunday.

Trump's favorability is significantly underwater in the new survey, which was conducted by Ipsos in partnership with ABC News using Ipsos' Knowledge Panel, with more than half of Americans -- including more than half of men (53%), Americans over 65 (53%), and independents (57%) -- viewing him unfavorably. The president's favorability deficit stands at minus-22 in the poll, similar to where he stood on the eve of the 2016 election.

-ABC News' Kendall Karson