Two dozen Democratic governors met Wednesday and emerged from the meeting unified behind President Joe Biden and his campaign, despite questions over his age and cognitive health following his fumbling debate performance. Speaking with reporters, Gov. Tim Walz, chair of the Democratic Governors Association, gave a clear message. “He has had our backs through COVID, through all of the recovery, all that has happened. The governors have his back and we’re working together just to make very, very clear on that,” he said. “A path to victory in November is the number one priority and that’s the num…