tired, until we get the gotcha moments he's talking about? we're better than that! >> i fought more than you put together. i've lost more sleep than all of you put together. >> it has been a momentous ten days for hillary clinton, the presidential candidate. by almost all accounts she emerged from that hearing without any significant missteps. the day before on wednesday, joe biden announced he would not challenge her for the nomination. and last week many believe she won the democratic debate. so, is hillary clinton riding a momentum? here to answer that brianna keilar and david. david, put that hearing into perspective. what did america learn from that? >> i don't know that america was looking for answers quite the same way the republicans were looking for answers on this.