WASHINGTON — Senator Chuck Schumer, the majority leader, and Senator Joe Manchin III, Democrat of West Virginia, were both nursing resentments when they met secretly in a windowless room in the basement of the Capitol last Monday to try to salvage a climate package that was a key piece of their party’s agenda.
Mr. Schumer was discouraged that Mr. Manchin had said he wasn’t ready to do the deal this summer, and might never be. Mr. Manchin…