WARSAW — President Joe Biden made a surprise and historic visit to war-torn Ukraine on Monday, a show of support and solidarity with a democratic nation battling for its survival after Russian President Vladimir Putin invaded nearly a year ago. “Biden was briefed on that final bit of planning Friday afternoon and decided the risks were mitigated to the point that he was comfortable moving ahead so we executed," Kirby said in an interview oh MSNBC. Biden is also facing cross-pressures from conservative Republicans, who believe the U