As voters are getting to know Hillary Clinton and Barack Obama better, their opinions are shifitng, usually for the worse.

An AP/Yahoo poll released today says, for example, that the proportion of people who view Obama as “not at all honest” jumped over the past five months from 18 percent to 27 percent. But Clinton fared far worse: she went from 36 percent to 40 percent. And there was a similar trend with “not at all ethical.”

And while significantly more respondents felt Clinton was much more experienced than Obama, when asked who had a better chance of beating John McCain, Obama jumped ahead of Clinton 56 percent to 43 percent, a sharp change from the last time the poll was taken.

But when the pollsters did one-on-one matchups against McCain, Clinton fared slightly better, though the difference was not statistically significant. McCain edges Clinton 37 to 36 percent and trumps Obama 36 to 34 percent.

Two other interesting notes: 15 percent of respondents believed – wrongly – that Obama is Muslim and Ralph Nader garnered 3 percent in a theoretical matchup of either McCain/Clinton or McCain/Obama.

The survey of 1,844 adults was conducted April 2-14 and had an overall margin of sampling error of plus or minus 2.3 percent. For the Democratic respondents, the margin of sampling error was plus or minus 3.3 points, and plus or minus 3.8 points for the Republicans.