"What matters is Donald Trump's approach to problem solving," Cuban said on CNBC's "Closing Bell" on Friday afternoon. "In my opinion and the reason I've been speaking out, I want to see somebody that shows analytical skills."
"I just haven't see that from Donald at all," he added.
Cuban's criticism is not the first time he has spoken out against the New York businessman. Taking to Twitter yesterday, Cuban instructed others to ignore Trump's speech writing, "Dear world. Please ignore what the loud guy in the suit is saying. Americans are nothing like him. We love our country and are proud of it".
On Friday, Cuban said he believed Trump's speech — in which he painted a dark picture of an America and accused corporate elites of betraying American workers — was aimed at voters who have lost their dreams.
"I think he was trying to reach those people who are disaffected and feel like their dreams aren't going to come true," Cuban said. "I'm a big believer in the concept that people have expectations about their lives and when they begin to realize that they're not going to reach those expectations, they get disappointed, they become disaffected and they react in different ways."
"One of those ways right now I think is supporting Donald Trump and he's certainly playing to that," Cuban said.
Cuban also said he would not be shocked if Trump won the popular vote but lost the electoral college. Cuban has previously tweeted that, "I'm convinced the @realDonaldTrump dream scenario is to win the popular vote but lose the election. All the glory. None of the work".