U.S. Senator Lisa Murkowski said she is struggling to decide whether she can support President Donald Trump's re-election bid, saying criticism of Trump's response to nationwide protests by former Defense Secretary Jim Mattis rang true. Subscribe: http://smarturl.it/reuterssubscribe Reuters brings you the latest business, finance and breaking news video from around the globe. Our reputation for accuracy and impartiality is unparalleled. Get the latest news on: http://reuters.com/ Follow Reuters on Facebook: https://www.facebook.com/Reuters Follow Reuters on Twitter: https://twitter.com/Reuters Follow Reuters on Instagram: https://www.instagram.com/reuters/?hl=en