As Southwest Side congressman Dan Lipinski faces a renewed Democratic primary challenge from the political left, he’s getting some high-level help from the party’s establishment.

Scheduled to star at a big-bucks Lipinski fundraiser next month is U.S. Rep. Cheri Bustos, a fellow Illinoisan, from the Quad Cities area, and, far more significantly, head of the Democratic Congressional Campaign Committee.

Tickets for the River North breakfast event will start at $1,000 a pop and go up to $5,600. (See invitation below.)

Team Lipinski hasn’t said how much the event will pull in, but it’s hard to imagine Bustos would agree to be the star attraction without at least the tacit approval of House Speaker Nancy Pelosi. And even tacit backing from the speaker will be valuable.

Pelosi, who represents a San Francisco district, probably is more in tune philosophically with Marie Newman, who fell just short of knocking out Lipinski in the primary last year and is gearing up to challenge him again.

But leaders rarely back primary challenges to sitting members of their own party, and Bustos’ help for Lipinski will make it at least a little harder to beat him.