Article II, Sec. 1, Paragraph 1 of the United States Constitution:
The executive Power shall be vested in a President of the United States of America. He shall hold his Office during the Term of four Years, and, together with the Vice President, chosen for the same Term, be elected, as follows.
A reasonable person might argue that this is pretty cut-and-dried. But no, we really have to sit here are refute an argument that the Vice President is somehow not part of the Executive branch. That's what we've come to. Someone makes a statement that is patently, indefensibly false (i.e. "The sun rises in the west") and we have to sit here and have a debate about it. Coming up next, our experts debate: does the sun rise in the east or in the west?
Yes, the Vice President has legislative duties (as the Letters of Cato put it, a duty given "for want of other responsibilities"). Yeah? And? So? The CJ of the Supreme Court has legislative duties as well – presiding over impeachment trials in the Senate. Does anyone argue that John Roberts is in Congress?
Speaking of impeachment…