LINCOLN, Neb. (AP) — Nebraska’s Legislature could see a major shake-up next year.

Five incumbent lawmakers came in second place in last week’s primary race, meaning they face a serious threat from a challenger in the November general election. One incumbent narrowly finished third but provisional ballots are still being counted.

If all six lose their seats, more than two-thirds of the senators in Nebraska’s Legislature would have two years of experience or less.

Some senators say they’re concerned that so many new members at once would lead to a more partisan and gridlocked Legislature. Sen. Bob Krist of Omaha says it’s a problem because the Legislature is complex, and new lawmakers need time to learn.

Eleven seats are open because of term limits, and another 17 lawmakers have only served since 2015.