While local leaders urged residents to avoid crowds, Sen. Martha McSally invited donors to join her for tacos and "martha-ritas."
Polling indicates that Trump’s public complaints about mail voting have turned some Republicans against the practice.
"I believe Joe has all the qualities we need in a president right now," Obama said in a nearly 12- minute video.
Benie Sanders ends presidential campaign after disappointing primary results, leaving Biden as likely Democratic nominee.
Polls show Democrats leading Republican incumbents in key Senate races in Arizona, Maine, North Carolina, and Colorado.
Here's how Sen. Martha McSally kicked off her 2020 campaign this week.
In 2016, voters had access to 60 voting locations during the Presidential Preference Election. For 2020, they’ll have access to 229.