Excerpts of Obama's speech were released earlier Wednesday showing that he will say he had hoped "Trump might show some interest in taking the job seriously. But he never did."

"He's shown no interest in putting in the work; no interest in finding common ground; no interest in using the awesome power of his office to help anyone but himself and his friends; no interest in treating the presidency as anything but one more reality show that he can use to get the attention he craves," Obama will say in his remarks closing out night 3 of his party's virtual convention."

"Donald Trump hasn't grown into the job because he can't."

Trump added that if Obama had done a "good job" he would not be in the Oval Office.

"The reason I'm here is because of President Obama and Joe Biden," the president said. "Because if they did a good job I wouldn't be here. And probably, if they did a good job, I wouldn't have even run. I would've been very happy."

"I enjoyed my previous life very much, but they did such a bad job that I stand before you as president," he concluded.

https://www.nbcnews.com/politics/2020-election/barack-obama-dnc-shred-trump-treating-presidency-one-more-reality-n1237351