Mitt Romney says his principles endure even in presidential election loss (+video)

"We're grateful that she convinced him to get into the race because we know that my dad has been uniquely prepared," said Romney's youngest son, Craig, as he addressed supporters early Tuesday evening.

As the state calls came in, and critical Ohio was called for Obama, Romney initially hesitated. He was set to leave his hotel to make the short drive to the ballroom where his event awaited. But then he held back. He waited nearly an additional hour. Aides quietly spread word he would step to the podium at 12:55 a.m.

His speech took less than six minutes. It ended as Romney's speeches almost always do.

"Thank you," he said. "Thanks, guys."

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