Wisconsin’s eight U.S. House seats might not be on the chopping block for 2020, but the state could be at risk of losing a seat after the 2030 Census, said David Canon, a UW-Madison political science professor who studies redistricting.

Every decade after the census, the U.S. Constitution requires the nation’s 435 House seats to be reallocated to account for any fluctuations in population.

Congress since the early 1940s has used the same mathematical formula to distribute congressional seats among the states.

The last time Wisconsin lost a congressional seat was after the 2000 Census, when the state lost one of its nine House seats despite 9.6% growth in the state’s population during the 1990s. Despite the gains, Wisconsin was unable to keep up with the dizzying growth in the South and West.

The state maintained eight seats after the 2010 Census.

According to Esri, a geographic software company, Wisconsin is not slated to lose a congressional seat after the 2020 Census, although neighboring Minnesota and Illinois are at risk.