Sen. Ted Cruz on Friday praised the choice of Robert Mueller to lead the investigation into whether President Trump's campaign colluded with Russia to influence the 2016 presidential elections. "I don't think it was necessary to appoint a special counsel," Cruz said. "But the Department of Justice made the decision to do that. If they are going to appoint a special counsel, Bob Mueller is an excellent choice." Cruz said Mueller, a former FBI director with a sterling reputation, would conduct a fair investigation.