The Senate is working on a major infrastructure bill that lawmakers hope will be signed by President Joe Biden by the end of September. “There’s broad agreement on is to get to work on service, transportation, our roads, our highways, and our bridges. That’s a Democrat priority, it’s a Republican priority, it’s a priority of our new president,” Sen. Tom Carper (D-Del.), chairman of the Senate Environment and Public Works Committee, told reporters on Capitol Hill in Washington on Wednesday. Carper sent letters to every other senator asking them to spend the next several weeks learning about what the infrastructure needs are in their states and to provide input to his committee’s staffers by March 19. The goal is to report the bill out of his committee before Memorial Day and have the president sign it by October. The starting point for the cost is $320 billion previously passed in a …