lol The amendment was made because all presidents objected to Congress being able to end a national emergency without the presidents agreement. The simple fact is the NPR article you are citing made no mention of the 1985 amendment which reversed the the original provision that allowed Congress to end an emergency without the president's agreement. Clearly, the writer did not do her research. I know that to you it is sacrilege to question NPR, but the facts are the facts and the writer clearly did not know about the 1985 amendment.
There was only one revision that came after the Supreme Court ruling in 1983. Here is where the NPR article referenced both.
"That veto-free arrangement, though,
did not pass constitutional muster when it went before the Supreme Court in 1983.
Congress' response was to revise the National Emergencies Act so that the termination of an emergency decree required a joint resolution signed by the president. If the president vetoes such a measure, a two-thirds majority vote in each chamber would be needed to override."
Furthermore, I don't believe there has ever been a law passed by congress that rescinds their Veto Overriding Power. That is part of their Constitutional Authority.
"After presidents objected to this "Congressional termination" provision on
separation of powersgrounds, it was replaced in 1985 with termination by an enacted
joint resolution.
This means that for Congress to rescind a declared emergency, not only must they pass the joint resolution, but the President must sign the legislation. The Act also requires the President and executive agencies to maintain records of all orders and regulations that proceed from use of emergency authority, and to regularly report the cost incurred to Congress."
National Emergencies Act - Wikipedia
If 2/3 of both houses vote to terminate the National Emergencies Act, then the emergency would also be terminated, but while the Act remains in effect, an emergency cannot be terminated by Congress without the President's consent.
No they can override him on any single piece of legislation he vetoes. Here is McConnell talking about the very thing.
"The original intent of the 1975 law was to allow Congress a block a presidential emergency by simple majority vote. But in 1983, the U.S. Supreme Court
struck down the legislative veto. So now, any joint resolution by Congress to terminate an emergency can be vetoed by the president.
And McConnell said Trump could do exactly that.
"
The president could win anyway by vetoing the bill and then trying to get enough votes to sustain it, so may ultimately be able to prevail on the national emergency alternative," McConnell told Fox News on Tuesday.
How congressional Democrats could fight a Trump wall national emergency declaration
Again, Congress would never give up that override power to the Executive.
From your post,
"So now, any joint resolution by Congress to terminate an emergency can be vetoed by the president."
McConnell is saying any effort by Congress can be stopped by the President.
We could go on an on with this discussion, but it is pointless since there is no way 2/3 of each house will vote against the President.
The reason why Trump is signing this Bill is because Republican Senators have already warned him that if he doesn't sign it, it will come back to him with a veto-proof majority. 7 Republican senators voted for Nancy Pelosi's House Bill to keep the government open. That's more than voted for Trump's proposal. Since the government re-opened, several other senators have privately told the President, that if he doesn't sign this Bill, they will side with the other 7 Republicans and the Dems to give the Bill a veto-proof majority.
So Trump is gambling that the same senators who threatened the veto, won't side with the Dems to condemn his Declaration of Emergency. I think that once again, Donald Trump will find that he has gambled wrong, just like he gambled wrong on the shutdown.
Trump is now agreeing to a sign deal that gives him less money for the Wall, than the deal McConnell offered him in December. Every day, in every way, the "Great Negotiator" is proving that he's anything but.