Arizona Senator Mark Kelly used to be an astronaut, and his wife was in politics long before he decided to seek elected office himself.

Arizona Sen. Mark Kelly and billionaire Elon Musk exchanged words on social media after Musk called the Democratic lawmaker a “traitor” for visiting Ukraine.

President Donald Trump’s increasingly influential adviser, Elon Musk, called Sen. Mark Kelly (D-AZ) “a traitor” over a social media post about the Arizona Democrat’s recent visit to Ukraine. The ...