A seemingly exhausted Sen. Hillary Rodham Clinton asked oil companies to play a bigger role in the energy solution and to subsidize new energy types at Houston’s Presidential Summit Thursday.

Executives from oil, natural gas, wind and solar energy corporations were in the crowd at the summit. This event was intended to be a debate between Democratic and Republican presidential candidates, but only Clinton and Congressman Ron Paul accepted. However, Paul dropped out of the summit earlier this week.

Clinton said that, in terms of energy, the U.S. is making half-measures without the necessary national commitment.

She stressed Houston’s national importance in terms of space and energy development.

“I want to continue to have Houston be a leader in both space and energy,” Clinton said. “The Houston economy can’t afford to wait when it comes to space, and America can’t afford to wait for Houston when it comes to energy.”