WASHINGTON (AP) — Democratic presidential candidates will descend on Iowa this week to do something that Native Americans say doesn’t happen enough: court their vote.

At least seven White House hopefuls have said they’ll attend a forum in Sioux City on Monday and Tuesday named for longtime Native American activist Frank LaMere, who died in June. Tribal leaders and citizens will talk with candidates about issues including health care, education and violence against Native women.

Several candidates attending the forum, including Bernie Sanders, Elizabeth Warren, Julian Castro and Marianne Williamson, have issued platforms dedicated to the needs of indigenous people.

Richard Witmer is a political scientist from Creighton University who specializes in American Indian politics and policy. He says the Native American vote can swing a close national election.