Donald Trump in Manhattan
U.S. Republican presidential candidate Donald Trump addresses the media regarding donations to veterans' foundations at Trump Tower in Manhattan, New York, May 31, 2016. REUTERS/LUCAS JOHNSON

Throughout the 2016 primary race, viewers' eyes have been glued to cable news programs to see what the candidates, especially the unpredictable Donald Trump, will do next. But voters are skeptical the candidates would actually do much at all if elected to office.

According to a Quinnipiac University national poll released Thursday, a majority of voters believe that Trump, the presumptive GOP nominee, and Hillary Clinton, the Democratic front-runner, will not keep some of their core campaign promises. The poll finds that voters do not believe Trump will be able build his proposed wall along the Mexican border or ban all Muslims from the United States, nor do they think Clinton will rein in Wall Street.

The poll, which surveyed 1,561 registered voters nationwide between May 24 and May 30, asked voters if they believed Trump would build his border wall to prevent illegal immigration from Mexico. Only 24 percent of those surveyed said yes. Almost 40 percent said Trump would try, but not be able to move forward with the controversial proposal, while almost 30 percent said Trump would not even try. Even a majority of Republican voters surveyed said Trump would either not build the wall or not be able to for other reasons. The wall and the issue of illegal immigration in general have been a cornerstone of Trump's campaign.

The same trend held true in the poll for many of Trump's other, more controversial campaign promises. Only 19 percent of voters surveyed thought the presumptive GOP nominee would or would be able to deport the approximately 11 million illegal immigrants currently residing in the United States. Only 29 percent of voters surveyed thought Trump would or would be able to ban all Muslims from entering the U.S.

Hillary Clinton faced similar skepticism in the poll. Only 9 percent of voters surveyed said Clinton would "remove secret money" from politics. More than 63 percent said she would not even try. Clinton has been criticized by both Trump and her Democratic rival, Vermont Sen. Bernie Sanders, for being too beholden to corporate interests and Wall Street. A majority of voters surveyed said she would not try to rein in Wall Street — only 21 percent said she would try, while only 15 percent said she could get the job done.

And Clinton's campaign promise to make in-state public colleges debt-free? Only 22 percent of voters surveyed said she could make it happen.

Recent national polling for how Trump and Clinton would fare against each other in the general election shows the two candidates essentially neck and neck, with only a 2-point Clinton lead separating them. Both Clinton and Trump are looking for a win in the June 7 California primary. Trump has already secured enough delegates to lock up the GOP nomination. Clinton, however, is still fending off a challenge from Sanders, who has himself been criticized for unrealistic policy proposals, such as free college tuition for public universities and universal healthcare. Sanders is tied with Clinton in California in some recent polls.