WASHINGTON - George W. Bush said Tuesday that he's backing presumptive Republican White House nominee Mitt Romney.
The former president offered a four-word endorsement of Romney as the doors of his elevator were closing after a speech in Washington.
Bush said: "I'm for Mitt Romney."
ABC News caught Bush after the speech, prompting his unscripted - but not surprising - endorsement.
Bush's parents, former President George H.W. Bush and Barbara Bush, endorsed Romney in March during an appearance in Texas. Former Florida Gov. Jeb Bush also publicly backed Romney.
In his speech Tuesday, Bush praised the Arab Spring movement and said the United States shouldn't fear the spread of freedom, even if it doesn't know what policies the countries will pursue.