All four Iowa Congressional districts will likely be competitive in 2020. Republicans were already targeting the first and third districts, where Representatives Abby Finkenauer and Cindy Axne defeated GOP incumbents last November. Democrats could make a play for IA-04, if Representative Steve King wins the GOP nomination again (as I expect).

Representative Dave Loebsack announced on April 12 that he will retire from Congress after completing his seventh term, rather than running for re-election in the second district. Both Sabato’s Crystal Ball and the Cook Political Report immediately changed their ratings on IA-02 from “likely Democrat” to “toss-up.”

A close look at Loebsack’s last two elections shows why that’s the right call.