Turnout is down. Way down.
Around 109,000 votes have been counted in Iowa tonight, and ABC News's estimated expected vote is roughly 115,000. Should that be about the final total vote tally, that'll mean roughly 5 percent of the voting-eligible population participated in the Republican caucuses. That represents a dramatic drop from 2016, when 8 percent took part in the Republican caucuses (7.5 percent participated in both the 2016 and 2020 Democratic caucuses). Even in 2012, 5.4 percent of the VEP voted in the GOP contest in Iowa, while Democrats set a record in 2008 when about 11 percent of the potential electorate in Iowa took part.
The subzero temperatures in Iowa likely played a part in why turnout fell, but the lack of a competitive race surely also diminished interest. The last time either party fell below 5 percent of the VEP in caucus turnout was in 2000, when both parties fell short. Democrats had an uncompetitive race between Al Gore and Bill Bradley (Gore won by 26 points) while Republicans had a closer contest, but one that George W. Bush still won by 10.5 points.
—Geoffrey Skelley, 538