The Democratic chairman of the U.S. House Intelligence Committee said on Sunday he was concerned that Special Counsel Robert Mueller may not be investigating President Donald Trump's ties to Deutsche Bank AG .

U.S. Rep. Adam Schiff announced last week a wide investigation into attempts to influence the 2016 U.S. presidential election as well as Trump's financial dealings, including "credible reports of money laundering and financial compromise" related to Trump business interests.

Deutsche Bank has lent the Trump Organization hundreds of millions of dollars for real estate ventures and is one of the few major lenders that has given large amounts of credit to Trump after a string of bankruptcies at his hotel and casino businesses during the 1990s.