Democratic presidential candidate Hillary Clinton highlighted one way to help close the wage gap between women and men : make sure women can find out if they are being underpaid.

The law should crack down on employers who intimidate or retaliate against workers for talking about their wages, Clinton said Thursday at a U.S. Hispanic Chamber of Commerce event in San Antonio.

"How do you know you're not being paid equally if you can't get information about what your work colleagues are being paid for doing the same job?" she asked.

As for why the wage gap persists, Clinton said, "Some of it, let's be honest, is just good old-fashioned discrimination. A lot of women in the workforce are just taken advantage of by their employers."