Senator Joe Manchin’s office said Monday the conservative West Virginia Democrat has secured a promise from party leaders and the White House to complete a highly contested gas pipeline. In 2020, construction of the Mountain Valley Pipeline was halted by a federal court after activists argued its construction violates environmental laws and could pose catastrophic threats to nearly 1,000 streams and wetlands. The deal to complete the pipeline came as Senator Manchin ended months of opposition to President Biden’s legislative agenda and agreed to support a scaled-down bill to combat the climate crisis.