[greeneyes]

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.
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That makes zero sense. If a President declares the emergency and Congress disagrees, he’s not going to sign that-he’ll veto it.

[stylin19a]

From the article linked below:
Since 1985, any congressional vote to stop the emergency can be vetoed by the president—and overridden only if there is a two-thirds majority in both chambers.

Seems like I found the playbook should Pres. Trump pull the trigger on this ?
https://qz.com/1518627/congress-making-bipartisan-plan-for-trumps-national-emergency/

They will refer to this document to justify judicial review:
https://fas.org/sgp/crs/natsec/98-505.pdf

[reed13k]

but the veto can then be over ridden so there is still some check on POTUS power as it should be - but takes more than a simple majority who disagree