Joe Biden was not in the banquet hall for the Iowa Democratic Party's blockbuster fundraiser on Sunday where 19 of his party's presidential candidates spoke. But he was present in the veiled criticism from several of his rivals, the AP reports. In five-minute chunks of speaking time, the candidates got the chance to make their case before 1,400 of the most influential Democrats in the leadoff caucus state. Some chose to nudge the national front-runner, and leader in a new Iowa poll, without naming him: