WASHINGTON — Politicians backing an unfinished West Virginia gas pipeline at the center of debate in Congress have received thousands of dollars in contributions from the companies behind the project, hold stock in those companies or both.

Sen. Shelley Moore Capito, R-W.Va., introduced legislation on Sept. 12 to change federal permitting law by, among other steps, limiting how long environmental reviews can take. It would also approve the roughly 300-mile-long Mountain Valley Pipeline, which would run from West Virginia to Virginia.