According to the Supreme Court there is an implied right to privacy which extends to a woman's decision to choose whether or not to have a baby. One can question the court's logic behind that ruling but there it is.
Now, what clause of the Constitution applies to orders to fill sandbags?
Article II, Section 2: “The President shall be Commander in Chief of the Army and Navy of the United States, and of the Militia of the several States, when called into the actual Service of the United States”
“He shall have Power, by and with the Advice and Consent of the Senate, to make Treaties, provided two thirds of the Senators present concur; and he shall nominate, and by and with the Adice and Consent of the Senate, shall appoint Ambassadors, other public Ministers and Consuls, Judges of the supreme Court, and all other Officers of the United States, whos Appointments are not herein otherwise provided for, and which shall be established by Law”
Article II, Section 1:
“No Person except a natural born Citizen, or a Citizen of the United States, at the time of the Adoption of this Constitution, shall be eligible to the Office of President; neither shall any person be eligible to that Office who shall not have attained to the Age of thirty five Years, and been fourteen Years a Resident within the United States.”
Amendment XII
“The President of the Senate shall, in the presence of the Senate and House of Representatives, open all the certificates and the votes shall then be counted”
Article I, Section 8:
“The Congress shall have Power... To make Rules for the Government and Regulation of the land and naval Forces (BDZ’s note - like the rules which prompted the manual OWS quoted to say that lowest-level orders are an execution of the orders down the chain of command, which begins with the Constitution that names the President as CINC)...To make all Laws which shall be necessary and proper for carrying into Execution the foregoing Powers, and all other Powers vested by this Constitution in the Government of the United States or in any Department or Officer thereof.” (BDZ’s note - such as the laws requiring objections to be called for when the electoral votes are counted)
Amendment XX, Section 3:
“If, at the time fixed for the beginning of the term of the President, the President elect shall have died, the Vice President elect shall become Prsident. If a President shall not have been chosen before the time fixed for the beginning of his term, or if the President elect shall have failed to qualify, then the Vice President elect shall act as President until a President shall have qualified; and the Congress may by law provide for the case wherein neither a President elect nor a Vice President elect shall have qualified, declaring who shall then act as President, or the manner in which one who is to act shall be selected, and such person shall act accordingly until a President or Vice President shall have qualified.”