Complex sentence: Massachusetts, Rhode Island, Connecticut, New York, and New Jersey are the only states in the nation where Catholics outnumber Protestants and other Christian denominations, while more than 20% of respondents in Maine, New Hampshire, and Vermont declared no religious identity.
Split into simpler sentences: Massachusetts, Rhode Island, Connecticut, New York, and New Jersey are the only states in the nation where Catholics outnumber Protestants and other Christian denominations. More than 20% of respondents in Maine, New Hampshire, and Vermont declared no religious identity.