"This is more about trying to act proactively, " she said in an interview with CNN's Jill Dougherty in Mexico City.

CNN: U.S. shares blame for Mexico drug violence, Clinton says

Lastly and least likely, credit card companies can proactively apply the CARD Act to business credit cards, both because it is the right thing to do and because it will prevent further federal regulation.

FORBES: The Problem With Business Credit Cards