Rep. Dave Loebsack’s announcement that he won’t seek reelection in 2020 gives both parties a chance to compete for the seat, an early battleground ground in which Democrats try to hold their majority for a second straight term.

The 2nd Congressional District, in southeastern Iowa, has been in Democratic hands since Loebsack, D-Iowa, wrested control of it in the 2006 Democratic wave. Previously it had been represented by a Republican, Jim Leach, for 30 years.