U.S. Representative Raul Griljalva said on Monday that 77 Democrats in the House have signed a letter to Speaker of the House Nancy Pelosi opposing the measure, a side deal that clinched Manchin's support for the Inflation Reduction Act climate bill that President Joe Biden signed last month. The tally was up from 72 signatures last week.

The letter said provisions in the bill will "allow polluting manufacturing and energy development projects to be rushed through before the families who are forced to live near them

are even aware of the plans." It would also "restrict public access to the courts to seek remedies against illegal project development" and weaken the Clean Water Act, the letter said.

The Democrats urged Pelosi in the letter to keep the legislation out of a temporary funding bill to keep the government operating through mid-December or any other must-pass legislation.

The issue illustrates a divide among Democrats ahead of the Nov. 8 midterm elections in which the party hopes to keep control of Congress. The White House, Senate Leader Chuck Schumer and Pelosi have indicated support for the bill.

Senator Shelley Moore Capito, a Republican from West Virginia, introduced the bill on Monday. It would speed approval of Equitrans Midstream Corp's long-delayed, $6.6 billion, West Virginia-to-Virginia natural gas Mountain Valley Pipeline within 21 days of enactment. The bill would also speed some permitting for renewable projects.

Independent Senator Bernie Sanders, who aligns with Democrats, said last week he opposes the "disastrous" side deal "that the fossil fuel industry is pushing to make it easier for them to pollute the environment and destroy the planet." In order to pass an initial vote, the government funding measure, known as a continuing resolution, must get 60 votes in the 50-50 Senate.

(Reporting by Timothy Gardner; Editing by Cynthia Osterman)

By Timothy Gardner