A former Mayor of Meriden has announced his candidacy for the 5th Congressional District.  Manny Santos declared his intent at Danbury City Hall yesterday.  Santos served one term as mayor of Meriden, the first Republican in the role there since 1983.  Democratic incumbent Elizabeth Esty is also being challenged by Republican Craig Diangelo of New Britain.  Esty has raised the most campaign funding among the state delegation in a district which has flipped between parties several times.  Esty was first elected in 2012.