Trump signs $1.3 trillion budget after threatening veto

President Donald Trump speaks in the Diplomatic Room of the White House Friday about the $1.3 trillion spending bill. (AP Photo/Manuel Balce Ceneta)

WASHINGTON — President Donald Trump grudgingly signed a $1.3 trillion federal spending measure Friday and averted a midnight government shutdown — but only after undercutting his own negotiators and setting off a mini-panic with a last-minute veto threat.