The primary election for Senate and Assembly seats will be held on Thursday, Sept. 13.

Below are some of the primary races that are expected to be competitive.

Senate Races

In the 51st Senate District, longtime incumbent Republican Senator James Seward is being challenged by businessman Jim Blake.

In Buffalo’s 63rd Senate District, freshman Democratic incumbent Senator Tim Kennedy is being challenged by Betty Jean Grant, the chair of the Erie County Legislature.

Assembly Races

In Rochester’s 137th Assembly District, longtime incumbent Democrat David Gantt is being challenged by Jose Cruz and City Councilman John Lightfoot.