Tight-lipped Mueller under pressure to call out Trump 'crimes'

Special Counsel Robert Mueller will answer questions for the first time Wednesday on his Russia meddling investigation

Pressure mounted on Robert Mueller, who headed the probe investigating Russian meddling, to spell out clearly in Congressional testimony Wednesday if he believes President Donald Trump committed a crime.

Three months after releasing the final report on his two-year investigation into the 2016 presidential election, much of the American public remains unclear about Special Counsel Mueller's findings on whether Trump criminally obstructed justice and whether his campaign colluded with Russians.