Joe Biden and Donald Trump Getty ImagesVoters, ages 50 and up, will have a strong influence on the November election. Meanwhile, for older voters, ages 50 and older, Social Security is a top economic concern, the results found. "Democrats only have a three-point advantage on Social Security right now, so the parties are basically tied," said Jeff Liszt, partner at Impact Research. Many voters said they would be more likely to vote for a candidate who will protect Social Security, he noted. Democrats in Congress have proposed plans to make Social Security benefits more generous, which would be paid for by taking the wealthy.

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Persons: Joe Biden, Donald Trump, Fabrizio Ward, Bob Ward, Jeff Liszt, — Organizations: Donald Trump Getty Images, Social, AARP, Social Security, Republicans, Impact, CNBC, Congress