Prominent civil rights leader the Rev. Jesse Jackson preached Sunday at a north Minneapolis church.

Jackson, who marched with Martin Luther King Jr. and later ran for president, was the guest preacher at New Salem Missionary Baptist Church, at 2507 Bryant Av. N.

Jackson, 76, disclosed in November that he has been seeking outpatient care for two years for Parkinson's disease. In a letter to supporters, he said family and friends noticed a change three years ago, and he could no longer ignore symptoms of the chronic neurological disorder that causes movement difficulties.

It was unclear how his treatment would affect his leadership of the Rainbow/PUSH Coalition, the Chicago-based civil rights group he founded more than 20 years ago. Jackson has remained active in his advocacy and travels.

A protégé of King and a witness to the 1968 assassination of the civil rights icon, Jackson was instrumental in guiding the modern civil rights movement on issues including voting rights and education.

Jackson was twice a candidate for the Democratic presidential nomination in the 1980s.

Jesse Jackson stood with Zenayzia Crite, 8, as he spoke to the crowd outside the governor's mansion in St. Paul on Friday. ] Isaac Hale ï isaac.hale@startribune.com Jesse Jackson surprised the crowd gathered outside the governor's mansion in St. Paul and spoke to them in the late afternoon on Friday, July 8, 2016.

The Associated Press contributed to this report. Paul Walsh • 612-673-4482