GOP Debate: ABC News, Yahoo! News, WOI-TV, The Des Moines Register and the Iowa Republican Party are sponsoring a debate of Republican presidential candidates at Drake University in Des Moines, Iowa.

The Iowa Caucus is the first official test of primary preference in the country and it is less than a month away on Jan. 3. The debate starts at 9 p.m. ET and lasts 90 minutes. Click below to get live commentary and perspective from ABC News and Yahoo News correspondents, reporters and editors.

Read more about the hits, jabs and punches at the debate: Oh No They Didn't: Candidates' Slams from the Iowa Debate

Were the candidates accurate? Read our debate fact-checker

Who scored the most tweets? Twitter and the #IowaDebate

Read about Gingrich's shout-out to Ted Kennedy

Gingrich on the negative GOP campaign: Can Republicans defeat Obama?