The US is terrible at investigating politicians

Mark Tushnet is a professor at Harvard Law. His research includes studies examining (skeptically) the practice of judicial review in the United States and around the world.The investigation into the Trump Campaign and the Russian allegations have followed President Donald Trump his whole Presidency.  He fired the FBI Director… criticized the Special prosecutor and calls the media fake news.  Why does it seem so hard for the U.S government to investigate our top politicians?  Here is a hint: It’s in the Constitution.  Mark Tushnet explains how we investigate politicians and how it can be better.