Article continues below advertisementJ.D. Vance is under fire after cracking a joke about Joe Biden "croaking."The Vice President of the United States upset critics after laughing about his own jab at the former Democratic leader - who is currently struggling with a recent cancer diagnosis.Vance made the comment while sitting down for a Thursday, November 13, interview with Fox News' Sean Hannity after being asked if he's prepared to take office should President Donald Trump's health ever decline to a point where he was no longer able to serve as U.S. commander-in-chief.