The proposed regulation would require employers to pay overtime to their salaried workers who are in executive, administrative, and professional roles, and make less than $1,059 a week, or $55,068 a year for full-time employees.

Although several of the Teamsters’ demands have been met, the union is still pushing to raise wages for part-time workers at UPS, who earn a minimum of only $16.20 per hour. "These part-timers are working at poverty wages," Teamsters President Sean O'Brien said.

Democratic lawmakers tried to pass a second bill that would have added paid sick days to the agreement, but were unable to reach the 60-vote threshold needed in the Senate, due to most Republican senators opposing the measure.