The White House has been forced to walk back or clarify multiple remarks made by President Biden during his trip to Europe On Saturday, Biden appeared to call for regime change in Russia, declaring that Russian President Vladimir Putin "cannot remain in power." On Friday, Biden was speaking to U.S. troops in Poland, and he said that Ukrainian people "have a lot of backbone" before appearing to suggest that the troops would soon be in Ukraine itself On Thursday, Biden was asked if the U.S. would respond if Russia were to use chemical weapons as part of its invasion of...