Tuesday night, it was hard to believe that a few short months ago, Rick Santorum was Mitt Romney’s bitterest foe for the Republican presidential nomination. In addressing a cheering crowd at the Republican National Convention as well as a primetime national television audience, the former Pennsylvania senator clearly demonstrated that the nomination battle is in the past and he is totally committed to the election of onetime rival Romney over Barack Obama.

In embracing Romney, Santorum laid the lash of his convention address on Barack Obama’s undermining of “tough love” welfare reform — a measure Santorum himself helped write while in Congress, he emphasized. By waiving the work requirement In “workfare,” he said, Obama is “acting as if he’s above the law.” He also invoked his immigrant family’s blue-collar background (“I’m a first generation American”) and brought to life his beloved coal-miner grandfather whose only value he brought to America “was freedom.”