For more than a century, the U.S. government had no real backup plan if the current president died or was unable to fulfill their duties — here's how JFK's assassination led to the creation of an order of succession. » Sign up for our newsletter KnowThis to get the biggest stories of the day delivered straight to your inbox: go.nowth.is/knowthis_youtube » Subscribe to NowThis: go.nowth.is/News_Subscribe For more news, subscribe to @NowThisNews. #JFK #Kennedy #25thAmendment #Assassination #Succession #USHistory #Politics #News #NowThis Connect with NowThis » Like us on Facebook: go.nowth.is/News_Facebook » Tweet us on Twitter: go.nowth.is/News_Twitter » Follow us on Instagram: go.nowth.is/News_Instagram » Find us on Snapchat Discover: go.nowth.is/News_Snapchat NowThis is your premier news outlet providing you with all the videos you need to stay up to date on all the latest in trending news. From entertainment to politics, to viral videos a...