President Donald Trump attacked former President Barack Obama on Wednesday, criticizing him for the message he delivered at the Democratic National Convention condemning his successor.

Trump appeared to be tuning into Obama’s address, tweeting “HE SPIED ON MY CAMPAIGN, AND GOT CAUGHT!” as the former president began his speech — a message Joe Biden retweeted, with the addition of a line from Obama’s speech that “Donald Trump hasn’t grown into the job because he can’t.”

As the speech continued, Trump again tweeted about his predecessor: “WHY DID HE REFUSE TO ENDORSE SLOW JOE UNTIL IT WAS ALL OVER, AND EVEN THEN WAS VERY LATE? WHY DID HE TRY TO GET HIM NOT TO RUN?”

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