But if you listened more closely to Biden, you could hear the contradictions that may grow louder in the coming months. If the goal of the campaign is national unity, how come the biggest applause lines were his harshest put-downs of Trump, like when he said the booming U.S, economy “was something he inherited ... just like everything else in his life”? And if Biden knows how to cross the aisle and work with the GOP to get things done, then why did he also boast his biggest achievement with Obama was passing the Affordable Care Act — “without any Republican votes!"