He may not be debating tonight, but Donald Trump is still trending on Twitter.

The Republican candidate decided to live tweet the first Democratic presidential debate, airing tonight on CNN, and he managed, as usual, to garner a lot of attention. 

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His tweets have been so popular that during the debate "Donald Trump's best #DemDebate tweets" were the top trending topic on the social network, with more than 1.5 million tweets on the trend as the debate was winding down. 

Here's a sampling of what the billionaire (@realDonaldTrump) has been tweeting and retweeting: