"Is a key part of Trump‘s new tax law unconstitutional? We may soon find out."

https://hartsburgnews.com/is-a-key-part-of-trumps-new-tax-law-unconstitutional-we-may-soon-find-out/120969/

Question for legal anons:

Was the tax cut a Trojan Horse?

It seems that the Dems are calling it unconstitutional. Yet, if it goes to the Supreme Court, it might actually undue the 16th Amendment altogether. Is this to what Trump was alluding with the new tax cut before November?