More than two-dozen House members have thrown the latest punch in a bare-knuckled fight that pits competing U.S. rocket manufacturers and their allies on Capitol Hill against one another.

A bipartisan group of 28 House members urged Air Force Secretary Heather A. Wilson in an April 12 letter not to alter the service’s blueprint for developing a new generation of rockets to lift U.S. military and spy satellites into orbit. But plenty of other lawmakers have pushed for several changes.

The 28 members urged Wilson “to do everything in your power to keep the acquisition on schedule.”

[Senators remain skeptical of Space Force]

The signatories included senior members of the defense authorizing and appropriations panels, such as Republican Michael R. Turner and Democrat Marcy Kaptur, both of Ohio.