If you are viewing actions of the legislature strictly through a partisan lens, you dont' have enough background to approach the original concern at all.
The original idea of the US government is three branches of government. If one branch of government "bipartisananly" wants to limit another branch of government, that should be cause for alarm and ideally the congressmen involved should be censured and possibly impeached. If you want to change the powers of the president, then it's time to rewrite the constitution, not do whatever the fuck this is.