Not if the law cuts off an executive power that a President has under the Constitution.
However it's not been proven that a Judge's approval was required prior to the wiretap orders being given.
I think the President concedes that there has been warrantless electronic surveillance outside of the confines of the limits set by FISA, "the law." The defense promulgated by the DoJ is not, "the activities are within the statutory limits of 50 USC 1801 et seq." The defense is that the President has the inherent authority, and that in combination with the Congressional Authorization to Use Military Force (AUMF) provides him the authority.
Furthermore, I would personally PREFER that the Government monitor ALL phone calls coming IN or going OUT of the Country.
In country calls are another matter.
If the government suspects Joe Terrorist, in the USA, of planning a terrorist attack, would you ignore calls between Joe Terrorist in the USA and John in the USA? Or would you figure Joe Terrorist is bad news, and want to know who is in his circle of bad guys, ESPECIALLY those in the US? RIght now that's a rhetorical question, but it may end up being a fair representation of the facts.
If they have time to suspect Joe and Bob terrorist are communicating with each other within the confines of the USA, then they have time to get a warrant.
Yes, I would oppose ANY warrantless searches inside the US>
The Constitution is not negotiable.
Period