February 3, 2020 9:43 am Democratic Candidates Makes Final Push for Iowa It’s down to the wire for Democratic presidential candidates in Iowa. Voters gather to caucus tonight, in the first official nominating contest of the 2020 election. US & World Videos 3:32 Biden on campus protests: ‘Order must prevail' 24:50 @Issue: Biden signs the foreign aid bill, and a retrospective of Boston's 2024 Olympics bid 2:15 Opening statements made, witnesses called in hush money trial against Donald Trump 24:46 @Issue: Trump “hush money” trial underway 2:08 Boston announces first chief climate officer