The ad wars in the lieutenant governor’s race are are heating up, with yet another hitting airwaves today. Lt. Gov. David Dewhurst’s new television spot targets Sen. Dan Patrick’s ethics and takes aim at his troubled financial past.

On Monday, Sen. Patrick released his second TV spot in less than a week, aimed at Lt. Gov. Dewhurst’s record on immigration.

Dewhurst and Patrick are locked in an ugly race for the state’s second most powerful position. Dewhurst, the incumbent, came in second in the March primary. The winner of the May 27 runoff will face Democrat Leticia Van de Putte in November.