More than half of U.S. voters disagree with the FBI's decision not to recommend charges against Hillary Clinton over her email practices when she was secretary of state, a new Washington Post/ABC News poll found.

One week after FBI director James Comey described the Democratic presidential hopeful's handling of classified material as "extremely careless" but determined that criminal intent did not exist, 57 percent of voters say they are worried about how Clinton would handle similar responsibilities as commander in chief.

Another 40 percent of respondents described themselves as "very worried" about the FBI's findings and whether Clinton can be trusted to receive classified intelligence briefings and perform the duties of the Oval Office. Thirty-nine percent said her email practices are unrelated to how she would act as president.

Nearly 60 percent of independent voters rejected the FBI's conclusion not to pursue charges against Clinton, while 31 percent of Democrats felt the same. Eighty-eight percent of Republican voters said the FBI director should have recommended charges to the Justice Department after several inconsistencies were found between what Clinton had said in public about her emails and what federal investigators found.

More than 40 percent of self-described liberals said the FBI's probe introduces concerns about Clinton's fitness to be president, and 56 percent of voters age 40 felt the same.

Still, 60 percent of respondents said the FBI's decision is unlikely to have an impact on who they vote for in the November election.

The Washington Post-ABC News survey of 438 registered voters was conducted in the 48 hours following the FBI's decision. Results contain a margin of error plus or minus 5.5 percent.