Yellen previously served as the chair of the Federal Reserve.
Officials did not say which agencies or infrastructure had been breached or what information taken in a March attack.
The president's demand that the government be paid by TikTok's Chinese owner or a potential American buyer is "probably illegal and unethical," an expert said.
Treasury Secretary Steven Mnuchin tried to mansplain Rep. Maxine Waters (D-C.A.) during a committee hearing. It didn’t go well for him.
Critics said the Justice Department’s decision could drive banks out of the cannabis industry.
By forcing cannabis businesses to rely on cash, the move might make businesses, owners and employees vulnerable to theft
In addition, the U.S. Treasury is sanctioning four Russians under a U.S. law known as the Magnitsky Act.
Banks and credit unions are becoming more comfortable serving marijuana businesses. But the progress could be wiped out by President Trump’s Justice Department.