Found dems had 8,064 votes (98.9%) for the incumbent in 2012 in Iowa.
For republicans this year it were 31,398 votes (97.1%) for the incumbent.
Not sure if I read the numbers right, better check for yourself:
https://en.wikipedia.org/wiki/2012_Iowa_Democratic_caucuses
https://en.wikipedia.org/wiki/2020_Iowa_Republican_caucuses