Republican Jack Ciattarelli and the top Democratic candidate are viewed favorably by a similar percentage of voters, a poll shows.

Political observers say endorsements from unions, celebrities and politicians could matter more in the crowded races of Tuesday's primaries where turnout could be low.

A crowded Democratic primary in New Jersey has candidates racing to cast themselves as best positioned to fight against President Donald Trump. Republicans, meanwhile, have turned their contest into a battle over who best represents Trump.