The Mayor of Washington DC is calling for changes and Congressional investigation into what happened at the Capitol on Wednesday. And says that President Donald Trump "must be held accountable." (Jan. 7) Subscribe for more Breaking News: http://smarturl.it/AssociatedPress Website: https://apnews.com Twitter: / ap Facebook: / apnews Google+: https://plus.google.com/1158922418018... Instagram: / apnews You can license this story through AP Archive: http://www.aparchive.com/metadata/you...