First lady Michelle Obama will rally Minnesotans with Democratic Gov. Mark Dayton and Sen. Al Franken on Oct. 21, the DFL Party announced on Wednesday.

The party described the event as a grassroots get-out-the-vote event but released few other details.

The first lady is one of a growing list of surrogates who have come to Minnesota to energize partisans.

This week, Republican Governors Association chairman Chris Christie visited a Columbia Heights charter school with Republican gubernatorial candidate Jeff Johnson and Republican Senate candidate Mike McFadden.

Earlier, former president Bill Clinton held an event with Dayton and Franken. Massachusetts Sen. Elizabeth Warren is also campaigning with Franken this weekend. Vice President Joe Biden will also visit the Eighth Congressional District on Oct. 23.

One surrogate not yet on the list: President Obama. The Democratic president, whose poll numbers are down in Minnesota, is road tripping to other states but Minnesota is not on his list.

Photo: First lady Michelle Obama meets with audience members as she campaigns for Pennsylvania Democratic gubernatorial candidate Tom Wolf, center right, Wednesday, Oct. 15, 2014, at the Dorothy Emanuel Recreation Center in Philadelphia. (AP Photo/Matt Rourke)