Special counsel Robert Mueller “is bearing down on former Trump campaign chairman Paul Manafort as he directs a wide-ranging probe into Russian interference in last year’s presidential election,” Bloomberg reports.

“Mueller’s team of investigators has sent subpoenas in recent weeks from a Washington grand jury to global banks for account information and records of transactions involving Manafort and some of his companies, as well as those of a long-time business partner, Rick Gates, according to people familiar with the matter.”

“As prosecutors gather many years of information about his financial affairs, Manafort could be dragged deeper into any number of legal disputes. He has a history of doing business with oligarchs and politicians in Ukraine and Russia that predates his political work for Trump, with payments routed through foreign banks and investments in U.S. real estate.”