Donald Trump targets ‘Little’ Michael Bloomberg and ‘Crooked’ Hillary Clinton on Twitter after DNC

Donald Trump is vigorously tweeting the morning after Democrats finished their presidential nominating convention. His targets? A few choice people who criticized him from the stage at the Democratic National Convention, including Michael Bloomberg and Hillary Clinton.

WATCH: Tough-talking Trump wanted ‘to hit’ DNC speakers ‘so hard’

1:11 Tough-talking Trump wanted ‘to hit’ DNC speakers ‘so hard’

The Republican presidential nominee referred to former New York mayor Michael Bloomberg, also a billionaire, as “Little Michael Bloomberg,” who “never had the guts to run for president” and whose final term as mayor was “a disaster.”

That’s a reversal from 2012, when Trump praised Bloomberg for reducing crime in New York City, declaring, “That’s leadership.”

0:31 ‘He spoke for 70 odd minutes and I do mean odd’: Hillary Clinton on Trump

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Trump attacked Allen, saying he “failed badly in his fight against ISIS.” The former deputy commander of the wars in the Middle East had called Hillary Clinton the kind of “commander in chief America needs.”

As for Clinton’s claim that Trump can’t handle a political campaign, he noted that he defeated a field of Republican hopefuls to win the GOP nomination.