CHICAGO — Illinois Gov. JB Pritzker is expected to endorse his lieutenant governor, Juliana Stratton, for the Senate on Friday, just two days after longtime Sen. Dick Durbin said he would not seek a sixth term. 

Pritzker plans to make the announcement — news of which was shared in advance with NBC News — at an event in the city’s Southside neighborhood of Bronzeville, where Stratton grew up. 

The backing — which is sure to include financial resources from Pritzker, a billionaire — instantly lifts Stratton’s profile in a race that is expected to draw a crowded field given that Durbin has held the seat for nearly 30 years. The group could include at least two Democratic members of Congress. 

Pritzker, a potential 2028 presidential hopeful, has historically not been shy about tapping his vast wealth to support his own campaigns, as well as Democratic efforts across the country. He is armed with a robust political operation in the state, as well as the political muscle to spur Stratton’s chances. 

“Over the past six years, I’ve had the privilege of working with Juliana Stratton, one of Illinois’ fiercest fighters for working families. She is a tested and steady leader who leads from a place of integrity, pragmatism, and dedication,” Pritzker said in a statement. “Juliana’s lived experience has made her a passionate and compassionate advocate able to get big things done. I’m proud to call her not just a partner in governance, but a true friend.” 

Pritzker and Stratton came into office in 2018 after a bruising election against another free-spending candidate, then-Gov. Bruce Rauner. 

The two have ushered in popular changes in the state, including protecting reproductive rights, raising the minimum wage and eliminating the state’s tax on groceries. 

Stratton on Thursday became the first person to launch her Senate campaign, just one day after Durbin, 80, announced he would not seek re-election next year. He said it was time for the next generation to lead the party.