The Senate version of Rep. John Delaney’s Partnership to Build America Act was introduced on Jan. 17 with ten co-sponsors, including Sen. John Warner (D-VA), increasing the political momentum behind one of the most bipartisan bills currently in Congress.

Sens. Michael Bennet (D-Colo.) and Roy Blunt (R-Mo.) are lead co-sponsors of the Senate bill (S. 1957). It allows P3 developers to receive financial support directly, addressing a key concern with the House bill. But it excludes social infrastructure other than schools, and it does not address the budget scoring issue that fed skepticism about its chances of passage in the House.