Would SCOTUS scrap HR1 if enacted into law?

[Sir Mohamed]

If Dems were able to pass HR1 during this congress, would subsequent enthusiasm from liberals and leftists be premature? There is literally a 100% chance GOP state AGs or right-wing organizations would immediately challenge the law before federal courts. That would inevitably end up before SCOTUS. Is this just my impression, or could SCOTUS in its current composition (give or take Biden replacing Breyer) actually scrap major parts of the law or just rule it unconstitutional as a whole? Their argument would be that election law is under the states' authority and the federal govt has no business in imposing such regulations.