Blue wave? California primary could be a sign for November

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For all their talk of a "blue wave," Democrats need a good day Tuesday in California to have much hope of seizing the House majority this fall. (Shutterstock photo)

For all their talk of a "blue wave," Democrats need a good day Tuesday in California to have much hope of seizing the House majority this fall.

No state will play a more significant role in the fight for control of Congress. And with primary elections across California and seven other states on Tuesday, the political battlefield will soon be set for the first midterm elections of Donald Trump's presidency.

Recognizing the high stakes, Trump sought to energize his supporters in a series of tweets praising his preferred California Republican candidates.

"In High Tax, High Crime California, be sure to get out and vote for Republican John Cox for Governor. He will make a BIG difference!" Trump tweeted.

RELATED: Bay Area June 2018 Election Day voting guide

Yet nightmare scenarios exist for both parties.

Because of California's unusual primary system, Trump's party faces the embarrassing prospect of not qualifying any candidate for the governor's race or the U.S. Senate . Democrats, meanwhile, could be shut out of a handful of competitive House races because they ran too many primary candidates and diluted their vote.

California tops a list of eight states with primary contests Tuesday from Montana to Mississippi and New Mexico to New Jersey.

With the possibility of a Democratic wave on the horizon, the elections will test voter enthusiasm, candidate quality and Trump's influence as each party picks its nominees to face off in November.

Francine Karuntzos, a 57-year-old retiree from Huntington Beach, California, said she has deep concerns about the Republican president - particularly his recent declaration that he could pardon himself. She said she isn't a member of a political party, but she voted Democratic on Tuesday.

"I'm really, really worried about our Constitution being ruined by this presidency," Karuntzos said after casting her ballot at a local community center.

Across the country in Montclair, New Jersey, Lynnette Joy Baskinger, a psychotherapist, said she's fed up with the GOP.

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"I still consider myself an independent, but I just won't vote Republican because of what's going on," she said.

It was a different story in Mississippi, where 66-year-old Gladys Cruz wasn't sure which Republican she would support in the state's Senate primary , but she wants whoever wins to firmly support Trump.

The president "touches my heart," she said.

While several states had competitive primaries on Tuesday, none will be more consequential in the fight for congressional control than California, which features seven Republican seats in districts won by Democratic presidential nominee Hillary Clinton in 2016. No other state features more than three.

Yet the state's unusual election laws complicate things for both sides.

Under California's system, all candidates appear on a single primary ballot, with the top two vote-getters regardless of party advancing to the November election. That allows the possibility of two candidates from the same party qualifying .

That's exactly what could happen in California's marquee races for Senate and governor, where Republicans fear the prospect of being left off the general election ballot altogether.

In the race to succeed term-limited Democrat Jerry Brown, two Democrats, Lt. Gov. Gavin Newsom and former Los Angeles Mayor Antonio Villaraigosa, are leading the pack. For the GOP, the Trump-backed Cox, a business executive, has the best chance at earning a spot.

It's also possible Republicans may not secure a nomination spot in the challenge against 84-year-old Sen. Dianne Feinstein, who is expected to easily win first place in her primary. Second place is far less certain.

On the other hand, Democrats could be shut out in a handful of House races, which would be a massive blow to the party's fight to claim the House majority this fall. The party must wrest at least 23 seats from Republican hands.

National Democrats have spent more than $7 million trying to curb and repair the damage inflicted by Democrats attacking each other in districts opened by retiring Republican Reps. Ed Royce and Darrell Issa, and the district where Republican Dana Rohrabacher is facing challenges from the left and the right.

That's money the Democrats would have preferred to spend promoting their candidates this fall.

Trump also urged Republicans to support the party's congressional candidates, in light of Democrats' increased chances of taking the House, where GOP retirements have made such a changeover more likely in the past year.

"Keep our country out of the hands of High Tax, High Crime Nancy Pelosi," Trump tweeted, referring to House Minority Leader Pelosi of San Francisco.

There are other kinds of drama playing out in other parts of the country.

RELATED: Democrats hoping for huge Election Day turnout to keep House dreams alive

In New Jersey , Sen. Bob Menendez is expected to become the Democratic Party's nominee for a third term despite being tainted by a hung jury in his recent federal bribery trial. Republicans hope to use the fallout to tar other Democrats in the state, including those fighting to defeat vulnerable GOP incumbents in suburban districts.

In Montana, Republicans will pick a candidate to take on Democratic Sen. Jon Tester, who is among the most vulnerable Democratic senators in the nation. The GOP struggled to recruit top-tier candidates, leaving the most likely nominees as state Auditor Matt Rosendale or retired Judge Russ Fagg.

Democrats have aimed their most aggressive attacks at Rosendale, seizing on his background in Maryland and questions about his experience as a rancher.

Governors' races will also take shape Tuesday in Alabama , Iowa , South Dakota and New Mexico, where Republicans in most cases are fighting to demonstrate their loyalty to Trump.

Tuesday's contests include one in South Dakota , where Rep. Kristi Noem's bid to become the state GOP's first female nominee for governor has opened the only House seat.

It may be a while before all of Tuesday's contests are decided, particularly in California.

The state allows absentee ballots to be mailed through primary day, meaning it'll likely be days before the final votes are counted.

Democratic strategists hope to see new evidence of an anti-Trump backlash, particularly in suburban districts across New Jersey and California, where many voters have soured on the Republican president.

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