It was recently announced that Manchin voted for the Inflation Reduction Act in exchange for easier permits for the Mountain Valley pipeline. Are such publicly known deals commonplace in Congress? This is the first time I hear about such an arrangement but perhaps it's actually pretty common? Are there some other examples of such deals in the past?
NB: I'm not talking about deals that happen within a single act of Congress, such Christmas Tree bills. I'm talking about deals where Congress passes legislation A while promising that legislation B will be passed in the future for the sake of one or more Senators/Congressmen.