Arizona’s Sinema and Kelly are two of just three Democrat senators who haven’t cosponsored the labor rights legislation.
Sen. Mark Kelly reported raising $10.4 million in the first six months of this year, with $7.6 million in cash on hand as of June 30.
The conservative-controlled US Supreme Court upheld Arizona’s laws restricting third-party ballot collection and out-of-precinct voting.
Sen. Mark Kelly’s term ends in 2022, and Arizona Republicans have already begun scrambling to challenge him for Sen. John McCain’s old seat.
Rally attendees said there's specific legislation they would like to see become law but feel don’t have a chance unless the filibuster is removed.
Biden is the second Democratic presidential candidate since 1948 to claim victory in the longtime Republican stronghold.
Former NASA astronaut Capt. Mark Kelly is facing off against Sen. Martha McSally in the race to represent Arizona in the US Senate.