The US president has invoked emergency powers that relate to national security based on the fight against fentanyl -with 490,000 American lives lost over 12 years, 5 times that in the Vietnam and Korean Wars combined. And based on enormous trade imbalances that relate to national security with China having $1 trillion trade surplus 12 times the next highest trade surplus of $81 billion of Japan in 2007.
Note that appellate courts upheld the Nixon 10% trade tariffs based on invoking emergency powers also based on trade imbalances that time in the 1980's with Japan. The SCOTUS would be overreaching its judicial power to strike down the president on his main platform in the election, says one expert.