In the wake of the Yemen attack plans Signal chat, Arizona Sen. Mark Kelly slammed Defense Sec. Pete Hegseth as the "least qualified secretary of defense in perhaps our country's history." ––– Subscribe to ABC News on YouTube: https://abcnews.visitlink.me/59aJ1G ABC News is your daily source of breaking national and world news, exclusive interviews and 24/7 live streaming coverage. Download the ABC News app for the latest headlines and alerts: https://abcnews.go.com/devices Watch 24/7 coverage