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Hosanna! Barack Obama is coming back to Philadelphia. The uber-popular former Democratic president will attend a campaign event in Philadelphia on Friday to support local Democrats, and tickets are available to the public.

The campaign event on Sept. 21 in West Fairmount park is being held to support races like those of Gov. Tom Wolf, and U.S. Sen. Bob Casey, both strongly favored to win in races against Trump-backed Republicans.

Obama previously turned up in Philadelphia for the Democratic National Convention and other campaign events on behalf of Hillary Clinton, holding a rally in Eakins Oval.

This time around, he’ll be supporting Wolf in his campaign against state Sen. Scott Wagner. Democratic U.S. Sen. Bob Casey is running for a third term against challenger Lou Barletta. (A fundraiser for Barletta attended by VP Mike Pence was protested by hundreds including women dressed as “handmaids.”) Obama will later on Friday attend a fund-raising event for Sen. Casey in Philadelphia.

Polls and fund-raising indicate Democrats will win both those races, but Pennsylvania, which was instrumental to electing President Trump, remains a heavily contested political battleground state, which Trump once said he “dreams about.”

Donald Trump Jr. will speak at a Pennsylvania Republican Party event in Hershey, Pa., also to be held on Sept. 21.

See Barack Obama speak in Philadelphia

Obama will attend the Democratic campaign event at the Dell Music Center at 2400 Strawberry Mansion Drive in West Fairmount Park.

Doors open at 2:30 p.m., and Obama is expected to speak around 4:45 p.m.

Tickets are free to the public, and are also offered in return for volunteer work. For more information on volunteering to get tickets, visit padems.com.

Tickets for the general public will be made available to the public on a first-come, first-serve basis starting at 12 p.m. on Sept. 18 at the following locations, all Democratic Party offices. Tickets will be offered at three locations in Philadelphia.

Tickets to see Barack Obama speak will available for free on Sept. 18, starting at 12 p.m., at the following locations:

Philly

-6817 Germantown Ave. in Mt. Airy

-Progress Plaza, 1501-17 N Broad St., near Temple

-4409 Chestnut St., West Philly

Other locations

-3900 Hamilton Blvd. Suite 101, Allentown, PA 18103

-714 N Bethlehem Pike Suite 200, Ambler, PA 19002

-Offices of Scott Wallace for Congress, 80 North Main St., Doylestown, PA 18901

-631 Pottstown Pike Exton, PA 19341

-434 Walnut St. Reading, PA 19601

-130 S State Rd, Upper Darby, PA 19082

For more information, visit padems.com.