Billionaire Mark Cuban has spent the past few days on social media defending Kamala Harris' economic proposals — while scratching his head over Donald Trump's plans. Harris unveiled some of her policy proposals on Friday at a North Carolina rally. They include a federal ban on price gouging for groceries, a $25,000 subsidy for first-time homebuyers looking to make a down payment, and a $6,000 child tax credit. So far, Cuban, who joined over 800 venture capitalists announcing their support for Harris in July, is gravitating toward her ideas.