Political analysts say a change to the party line on the ballot could have a significant impact on the US Senate primary.

Senator Bob Menendez is staring down a monday deadline to file for reelection and told NJ Spotlight News in a brief interview last night he'll make an announcement on his plans this week.

A majority of Senate Democrats have urged him to resign.

So of Republicans, including the GOP contenders in New Jersey's primary, who may see an opening amid all of the dysfunction on the Democratic side.

Senior correspondent Brenda Flanagan has an update on the GOP race.

We are well positioned as the front runner.

We're the only campaign that is actually building infrastructure to compete statewide.

Republican Curtis Bashaw's confidence is high as he campaigns for the U.S. Senate seat now held by indicted Senator Bob Menendez.

The Cape May developers wooed GOP county committees seeking the coveted county line on Jersey's June 4th primary ballot, even as Democrats battle in court over whether that system unfairly favors candidates picked by political bosses.

Well, I've been doing the county lines while this thing has happened, so it's a huge irony.

Indeed, because got no qualms playing by those rules.

He calls the county convention process.

Participation in democracy.

Different counties have different bylaws with their Republican or Democratic organizations.

I felt it was very Democratic.

These committee people are elected to their job to help the Republican Party that they're competitors.

So I found it invigorating, exhausting, challenging, very exciting process.

And what happens now remains to be seen.

The Republican contest pits Bashaw a self-described moderate against two main opponents, Mendham Mayor Christine Serrano.

Glassner, who won the line in Bergen County last night, and former News 12 reporter Alex Zdan.

As it stands, 12 GOP county committees have endorsed Bashar.

Five picked Serrano Glasner and two chose Zdan.

The rest didn't endorse, although Hudgins, a GOP county chair, says he's behind Serrano.

Glassner.

Analyst Chris Russell sets it up.

I think with a solid South jersey and a big, big fish like Ocean County and some other places, I think, you know, Bashar is your leader in the clubhouse.

Should they shall they say?

But I think Glassner is still able to be competitive, but she's going to have to raise money.

And I think Alex Zdan you know, can be a spoiler potentially in this race.

I don't know who he would spoil it for.

Meanwhile, Jersey legislative leaders, including Republicans, have signaled they intend to control ballot reform efforts.

But if the court strikes down the county line, candidates will have to compete for name recognition.

That's expensive and time consuming, says writers Micah Rasmussen.

And so it does become a completely different race overnight.

It throws it into the same kind of turmoil and chaos.

But on the Democratic side, at least, Andy Kim and Tammy Murphy both have the kind of money to be able to compete statewide.

I think on the Republican side, they're going to be scrambling.

Bashar says he could self-finance while some hard right critics call him a de facto Democrat who didn't vote for Donald Trump.

He now supports Trump at the top of the ticket.

Why?

I believe President Trump has been vindicated on many, many issues.

And I think the mudslinging in our little primary, if people try to make a label out of something that's simply not true or exaggerated, is a distraction from the fact that they don't have the infrastructure to run a statewide campaign.

Zdan didn't respond to requests for an interview.

And Serrano Glassner, a staunch Trump supporter who's also backed by the conservative Moms for America lobby, wasn't available.

Russell says a Trump endorsement could be a game changer in this primary race.

I'm Brenda Flanagan, NJ.

Spotlight News.