A national emergency can justify almost anything, up to and including martial law. That's why it shouldn't be allowed to be used as a political tactic like trump is trying to do.
Actually the Declaration of a National Emergency' triggers up to something like 120 other laws and regulations, depending on the TYPE of 'National Emergency' declared.
The TYPE of NE Trump is considering would only trigger 1 (ONE) of those, pre-established Congressional-authorized moving / freeing up of money to fund the wall - nothing else.
Pelosi is full of shit regarding Trump's NE would 'set precedence', but by all means, don't let the fact that she is lying to your ass again, snowflakes, stop you from parroting her BULLSHIT.
NEs have been declared approx. 59 times since they were 1st used beginning with Jimmy Carter. 32 (I believe) of those remain in existence today -- YEAH, THERE ARE APPROX 32 STATES OF EMERGENCY IN EXISTENCE TODAY...yet no one is freaking out about any of them except the one that might be declared NEXT. (32 still exist, to include the very 1st one Carter declared regarding Iranian-sponsored Terrorism.)
- So, again, Pelosi's claim that Trump's would set precedence is PURE BULLSHIT.
Also, as mentioned, a President can not use a NE to violate the Constitution or infringe on Constitutional Rights. This is just a lie and more Democratic party Fear-Mongering.