Let’s take a look at a recent fact-check for some of the candidates:
Bush: "My plan actually gives the middle class the greatest break: $2,000 per family." Middle-class families could potentially realize a higher percentage tax break, based on Bush’s plan. But that’s only counting those who would file their tax returns using the standard deduction, something the wealthy aren’t likely to do. Even with caps on itemized deductions, a range of experts said the wealthiest Americans stand to benefit more than the middle class, thanks to Bush’s proposed changes in corporate, estate and other taxes. We rated this statement Mostly False.
Rubio: "Welders make more money than philosophers." It made for a great soundbite, but neither salary nor labor statistics back up Rubio’s claim. Statistically, philosophy majors make more money than welders -- with much more room to significantly increase pay throughout their careers. We rated this statement False.
Carson: Says Hillary Clinton told her daughter and a government official that Benghazi "was a terrorist attack, and then tells everybody else that it was a video." Carson is oversimplifying and distorting Clinton’s comments to portray a complex situation in the worst possible light. He has a point that Clinton told her daughter that terrorists attacked in Benghazi, and she told the Libyan president that a terrorist group had taken responsibility. But those were private comments made hours after the attack. Carson misleads when he said that she told everybody else that it was a video. We rated this statement Mostly False.
Trump: Says President Dwight Eisenhower "moved 1.5 million illegal immigrants out of this country." Trump is referring to a 1954 campaign known as "Operation Wetback." While the idea that the operation resulted in more than 1 million deportations is not pulled out of thin air, historians widely cite that number as far too high for a variety of reasons -- including the fact that hundreds of thousands of undocumented immigrants would have had to self-deport. We rated this statement Half True.