For Biden and other moderates who argue that Sanders is too liberal to beat Trump and who have been trying to blunt his momentum, however, the job has become much harder.
The essay netted a young Pete Buttigeig $3,000 after it won first prize in a national competition.
Zimmerman claims that the two Democratic candidates have defamed him in an attempt to gather votes from the African-American community.
Some of his rivals have made clear they see the televised debate as their best opportunity to subject Bloomberg, who has been rising fast in the polls, to greater public scrutiny.
Recent polls in New Hampshire put him in second place, after Bernie Sanders.
Biden said Trump would have an easy time ripping into Sanders in a general election campaign, and Sanders would drag down other Democratic candidates in federal and state races.
Major issues with the app associated with releasing the Iowa caucus results led to a late reveal of the results.
With around 70% of votes counted, moderate candidates were leading over the progressives, suggesting good news for US-Israel relations.
Horowitz, who is one of four gay MKs in the current Knesset, said he was happy to see a gay candidate run for president of the United States.
Former Vice President Joe Biden trailed badly in fourth place with about 71% of precincts reporting.