What's at stake

A single Republican will become the party's nominee for New Jersey's U.S. Senate seat in the primary.

That nominee will shape the general-election matchup, fundraising flows, and whether national GOP groups invest in the race.

Who's in play

Justin Murphy, Richard Tabor, Natalie Rivera, Alex Zdan, Vinnie Brand, Robert Lebovics, Alina Habba, and Steven Boston are the principal Republican contenders on the ballot.

State GOP leaders, county committees, big donors, and national conservative groups will weigh in via endorsements, advertisements, and get-out-the-vote operations.

What drives it

Endorsements and fundraising shape perceptions early; well-funded ads and name recognition boost a candidate's reach.

Debates, primary polling, and turnout among conservative-leaning GOP voters shift chances in the final weeks.

What to watch

Watch county-level early-voting returns and the official primary date for spikes in turnout.

Also track high-profile endorsements, late ad buys, debate performances, and any polling or spending reports released in the two weeks before the vote.