A quarter of Americans remain undecided on the 2016 presidential race as Hillary Clinton and Donald Trump pivot their campaigns toward the general election.
Twenty-five percent of voters have not decided who they would vote for if the election were held today, including 14 percent of voters who say they would vote for "neither" candidate, according to a new CNBC All-American Survey released Monday.
"It’s the hallmark of a campaign with high negatives around these candidates," said Republican pollster Micah Roberts.
Among those who backed Sen. Bernie Sanders (I., Vt.), 20 percent say they would vote for neither Clinton nor Trump.
Clinton holds a 5-point leader over her Republican challenger, leading Trump 40 percent to 35 percent.
The survey was conducted between June 11 and 14, during which time gunman Omar Mateen killed 49 at Orlando’s Pulse nightclub in the largest domestic terror attack since September 11, 2001. Pollsters said the terrorist attack had little impact on an individual’s presidential choice.
When asked who would best deal with terrorism and homeland security, Trump edged out Clinton by only 2 percent.
Democratic pollster Jay Campbell said the small margin between the two candidates on terror raises a "red flag" for Trump, as Republicans have historically led in polls on national security issues.
Negative views of the two candidates are at a three-decade high among presidential nominees of the Democratic and Republican parties.
A Washington Post-ABC News poll released last week found that 7 in 10 Americans hold unfavorable views of Trump while more than half—55 percent—view Clinton negatively.