Minnesota Gov. Mark Dayton (D) on Sunday announced that he signed a bill creating a presidential primary starting in the 2020 election to replace the current caucus system.

Critics of the caucus system argue that caucuses exclude voters unable or unwilling to attend a lengthy process.

The Minnesota secretary of state, Steve Simon, told Minnesota station KMSP in March that the primary could allow more voters to participate in the primary.

“Keep in mind if it’s a real primary election, unlike a caucus, there would be an absentee period where people would vote before the election. Not so with caucuses, where you need to be there in person at a particular hour, 7 p.m., or else you can’t vote,” he said.