Conn. Gen. Stat. § 9-173: Plurality required for election.

In the election for Governor, Lieutenant Governor, Secretary of the State, Treasurer, Comptroller and Attorney General, the person receiving the greatest number of votes for each of said offices, respectively, shall be declared elected. If no person has a plurality of the votes for any of said offices, the General Assembly shall choose such officer. In the election for senator in Congress, the person receiving the greatest number of votes for such office shall be declared elected; but, if no person has a plurality of the votes for said office, the Governor may make a temporary appointment of a senator in Congress to serve for the ensuing two years unless the General Assembly directs a special election for a senator in Congress, to be held during said period, to fill the vacancy occasioned by such failure to elect. In all elections of representatives in Congress, state senators, state representatives and judges of probate, the person having the greatest number of votes shall be declared elected. Unless otherwise provided by law, in all municipal elections a plurality of the votes cast shall be sufficient to elect.