If you think your vote doesn’t count, here are three hotly contested races from districts in New York and New Jersey that are likely to be decided by a handful of voters. Liuba Grechen Shirley, Antonio Delgado and Tom Malinowski, endorsed by the Times editorial board, will be campaigning tirelessly from now until Election Day. They hope to be part of the wave that will help Democrats regain control of the House of Representatives.

Liuba Grechen Shirley

New York’s 2nd Congressional District

Ms. Shirley, a Democratic activist, successfully lobbied the Federal Election Commission to allow her to use campaign funds for child care, then took on the veteran incumbent Republican Representative Peter King, who voted to repeal the Affordable Care Act and has whipped up anti-immigration sentiment. Ms. Shirley supports Medicare for All and a $15 minimum wage. She says she is running to see more working people in Congress.