New Jersey's 7th congressional district

New Jersey's 7th district and the 12th district were redistricted after the 2000 census by a bipartisan panel. By consensus of the panel, the Democratic and Republican parties agreed to trade areas in the two districts to make them safer for their respective incumbents. It is likely that this tradeoff, which made New Jersey's 7th less competitive for Democrats, had an effect on the outcome of 2006 election, which was decided by approximately 3,000 votes. Areas of the former 7th district such as Somerset in Franklin Township (Somerset County) that had historically voted reliably Democratic were moved into the adjacent 12th district to shore up the Democratic incumbent's hold on there, while reliably Republican Millburn was removed from the 7th, and instead split between the 10th and 11th districts. Despite the redistricting, NJ-07 was still the most competitive House district in New Jersey, and was the only one considered to be in play in 2006 by political pundits.

In the 2018 election, Tom Malinowski,[9] former Assistant Secretary of State for Democracy, Human Rights, and Labor, was considered the front runner among the Democrats challenging Republican incumbent Leonard Lance.[10][11] Malinowski was endorsed by Westfield teacher/attorney Lisa Mandelblatt and attorney Scott Salmon when they withdrew from the race in February 2018.[12][13] Other candidates in the Democratic primary included lawyer Goutam Jois;[14] and social worker Peter Jacob, who was defeated by Lance in the 2016 election. Green Party of New Jersey member Diane Moxley also announced her intent to run for the seat.[15] Lindsay Brown, a product manager at the New York Post and a self-described progressive, ran in the Republican primary against Lance.[16] Berkeley Heights banking executive Linda Weber[17] and environmental advocate David Pringle[18] withdrew in March 2018.

During the fourth quarter of 2017, the Malinowski campaign raised $528,000 while the incumbent Lance raised $237,000. Jois raised $189,000 and Jacob raised $29,000.[11][19]

Malinowski won the Democratic nomination in the June primary.[20]

In the Democratic primary Malinowski prevailed with 26,059 votes and 66.8% of the vote. Jacob finished second with 7,467 votes and 19.1% of the vote.[21]

Lance won the Republican primary with 74.9%, and 24,856 votes.[21][22]

• Martis, Kenneth C. (1989). The Historical Atlas of Political Parties in the United States Congress. New York: Macmillan Publishing Company.
• Martis, Kenneth C. (1982). The Historical Atlas of United States Congressional Districts. New York: Macmillan Publishing Company.
• Congressional Biographical Directory of the United States 1774–present