(Image source from: WTVB)

New Jersey and California voters in competitive congressional districts will go to the polls on Tuesday to select candidates in primary elections that will shape the fight to control United States Congress during the President Donald Trump era.

Democrats need to win 23 seats nationwide to wrest control of the U.S. House of Representatives from Republicans in November and California is seen as key to taking a majority.

The eight state voters will be voting in primaries on Tuesday.

Democrats have targeted 10 out of the 14 seats in California held by Republicans. The contests on Tuesday will determine whether Democratic candidates in the swing districts are advanced or moderate.

"What's going to be the profile of these Democrats from Republican districts?" said Mark Baldassare, president of the nonpartisan Public Policy Institute of California. "Will they get somebody who says they want single payer health care, or will they talk about economic mobility?"

Regardless of the party, the primary system, so called state's jungle primary system lets the highest two vote-getters to progress to the general election in November.

In the 48th congressional district, the battle for the top spots is particularly dramatic where electors chose Hilary Clinton over Donald Trump in Presidential election 2016 but reelected longtime Republican Congresswoman Dana Rohrabacher.

Umpteen Democrats will be vying to challenge Rohrabacher in the fall that there is a possibility of dividing their party's vote setting up a general election fight between incumbent and leading Republican opponent Scott Baugh.

"I don't think the Democrats can take the House without New Jersey," said Brigid Harrison, a political science professor at Montclair State University.

In Iowa, health care has taken in the state's gubernatorial race center stage, where Democratic challengers Fred Hubbell, a wealthy businessman, and Cathy Glasson, a nurse and union leader, have criticized Republican Governor Kim Reynolds for encouraging the state’s privatization of Medicaid.

Possibly no state is more important to Democratic hopes of taking back the House than New Jersey after California. All merely one of its five Republican-held House seats are considered competition and ire at Trump may be particularly potent in the state’s many suburbs.

Voters on Tuesday will as well choose candidates in Mississippi, Alabama, South Dakota, Montana and New Mexico.

By Sowmya Sangam