Mark Cuban has a bone to pick with Donald Trump.

The billionaire investor and Shark Tank judge took to Twitter on Tuesday evening, where he criticized the Republican nominee for failing to release his tax returns and took aim at his management strategy. Cuban praised Hillary Clinton, the Democratic nominee, and husband Bill Clinton, citing their taxes as evidence that they are "much smarter business people and negotiators." 

Cuban had previously suggested he would consider running as vice president to either Trump or Clinton.  

For his part, Trump hasn't responded (at least not yet) on Twitter to Cuban's ruminations.

Earlier in the day, Cuban had tweeted an article by the far-left blog, Media Matters, accusing Clinton Cash author and Breitbart News senior editor-at-large Peter Schweizer of possible inaccuracies in his book on the Clintons' personal wealth.