Elon Musk's feud with President Donald Trump has reignited, with the tech billionaire threatening to launch a new political party and Trump suggesting Musk could be punished for his opposition.

Today’s installment of campaign-related news items from across the country.

Learn how the Social Security number has evolved over the last 90 years from a code to track earnings into the passkey to Americans financial lives.

The shootings of two Minnesota lawmakers and their spouses are the latest instances of increasing political violence.

Vance Boelter, 57, had three semiautomatic rifles and two handguns, one in pieces, when he murdered a state lawmaker and her husband, and shot a state senator and his wife, authorities said.

Minnesota lawmaker shooting suspect Vance Luther Boelter is in custody, but bad-faith responses by figures like Elon Musk and Mike Cernovich show the dangers of violent partisan rhetoric.

The attacks on two Democratic Minnesota state lawmakers at home are the latest in a grim spike in political violence.