In CT our state constitution has prevented us from having early voting. The CT state constitution is oddly specific about voting procedures and says which day people must vote, unlike most other state constitutions. It isn't clear to me if this was done intentionally to prevent early voting, as early voting wasn't really a thing anywhere when the state constitution was written in 1965.

We tried to amend the constitution in 2014, but the ballot language was confusing and it didn't pass. Hopefully it does pass this year.