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.

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.

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