Biden tries new line of attack against Trump: Mocking his age CNN 0 77 02.28 03:22 https://www.youtube.com/watch?v=qJ_PPrnzrRc + 9 https://www.youtube.com/feeds/videos.xml?channel_id=UCupvZG-5ko_eiXAup… + 14 Biden tries new line of attack against Trump: Mocking his age