Factbox: Democrats in Congress take aim at Trump with multiple probes

Democrats took control of the House of Representatives in January, giving them new investigatory powers including the ability to issue subpoenas. Mueller is due to submit to U.S. Attorney General William Barr a report on his investigation into whether Trump's campaign conspired with Russia and whether the president unlawfully sought to obstruct the probe. Mueller's findings and those of the congressional committees may influence whether Congress seeks to impeach Trump and remove him from office.