Prosecutors from special counsel Robert Mueller's office said Monday that former Trump campaign chairman Paul Manafort violated his plea agreement with the government by lying to federal investigators "on a variety of subject matters."

Former Trump campaign chairman Paul Manafort has reached a tentative deal with federal prosecutors to avoid his upcoming trial on charges related to his foreign lobbying work, two sources familiar with the case tell CBS News. 

Paul Manafort signaled Friday that he intends to plead guilty ahead of a second trial as prosecutors filed new charging documents against the former Trump campaign chairman.