Originally Posted by alfaniner
FFS. The branches are separate but equal in authority. In theory. It's a weird-ass legal theory that is hopefully true, but has never been fully explored or tested (hence the controversy over the Executive contesting Legislative subpoenas).
It is *not* a theory proscribing communication and cooperation between the branches.
Under the actual separate-but-equal theory, only the Legislature has the authority to prohibit one of its members from talking to the president. And only the Executive has the authority to decide whether or not to talk to a senator when they ask.