Top Democrat in U.S. Senate wants hearings before any impeachment effort

The top Democrat in the U.S. Senate said on Tuesday that Congress should thoroughly investigate the findings of Special Counsel Robert Mueller before deciding whether to move forward with impeachment proceedings against President Donald Trump.U.S. Senate Majority Leader Mitch McConnell on Tuesday sought to slam the door on further investigations of Trump by declaring "case closed" after a two-year probe of Russia's meddling in the 2016 elections.