Democrats put a big burden on the shoulders of former special counsel Robert Mueller heading into his congressional testimony Wednesday. They hoped Mueller’s testimony could produce an ironclad case for impeaching President Trump, specifically on the grounds of obstruction of justice.

On Wednesday morning, Rep. Ted Lieu posited to Mueller, “I’d like to ask you the reason again that you did not indict Donald Trump is because of OLC opinion stating that you cannot indict a sitting president, correct?”