First was Barr's claim that Trump was "falsely accused."This.
"Trump was not falsely accused of anything," said Barbara McQuade, a former U.S. attorney, told TPM. "He was engaged in contacts with Russians that were profoundly wrong even if it did not amount to a crime of conspiracy. He should not be absolved of obstructing the investigation into that conduct." Additionally, even if Trump was sure that he had not conspired with the Russians, there was no way for him to know for sure whether those around him had or not.
Then, there was Barr's suggestion that Trump was acting in good faith to shut down an investigation he found to be baseless.
As Alex Whiting, a Harvard law professor and former federal prosecutor pointed out, Trump did not seek to end the Mueller probe in the open where he could accept the political ramifications of such a move. Instead, he often acted secretly, giving certain orders in private -- including when he cleared the room to talk to then FBI Director James Comey -- and seeking to use rogue agents, such as his former campaign manager Corey Lewandowski, when officials in his White House refused to carry out his orders. He often changed his story and demanded that others in the administration, like White House Counsel Don McGahn, change theirs. "He didn't act like somebody who was obeying the law. He acted like somebody who was breaking the law," Whiting said.
And finally, Mueller provided plenty of evidence of corrupt motives that were driving Trump: the political embarrassment of the investigation, the fear that it delegitimizing his 2016 election win, the belief that some of the conduct of him and his associates could be perceived as criminal. "If a President is shutting down an investigation because he thinks it will embarrass him politically or undermine the legitimacy of his election, that is corrupt intent," Sklansky said.