The Delaware Supreme Court ruled on Friday to overturn the vote-by-mail and same-day voter registration legislation, marking a huge blow to Gov. John Carney and Democrats.

The decision came just one day after oral arguments were heard on whether allowing all registered voters the choice to cast their ballot through the mail violates the state's constitution. The decision was only three pages long, with justices writing that a more formal opinion will be issued soon.

With the midterm election slated for Nov. 8, the Department of Election had intended to send mail ballots to voters on Oct. 10, which will now not happen.

The justices wrote in their ruling that the vote-by-mail legislation “impermissibly expands the categories of absentee voters identified” in the state constitution. The same-day registration law also conflicts with articles of the constitution, the justices wrote.