Candidates say farewell to the Joe Biden candidacy that wasn't

Vice President Biden's would-be rivals offered swift and succinct reactions via Twitter to his announcement Wednesday that he would not seek the Democratic presidential nomination.

For Republicans, it was another chance to slam Democratic front-runner Hillary Clinton.

A quick sampling:

Republican Mike Huckabee, who trails in the polls, used Biden's departure to remind folks that he's a former Arkansas governor who's battled with Democrats in the state loyal to the Clintons, the state's former First Family.

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