Donald Trump's presidential campaign unveiled its agricultural advisory committee on Tuesday, featuring former 2016 rivals and several GOP governors.

Former governors Jim Gilmore of Virginia and Rick Perry of Texas are two former primary rivals named as advisers on the agricultural committee. Others listed on the committee include leading Republicans such as Kansas Gov. Sam Brownback, North Dakota Gov. Jack Dalrymple, South Dakota Gov. Dennis Daugaard, Oklahoma Gov. Mary Fallin and Iowa Gov. Terry Branstad, a supporter of ethanol subsidies.

"The members of my agricultural advisory committee represent the best that America can offer to help serve agricultural communities," Trump said in a statement. "Many of these officials have been elected by their communities to solve the issues that impact our rural areas every day. I'm very proud to stand with these men and women, and look forward to serving those who serve all Americans from the White House."

The committee is chaired by Charles Herbster, already an agricultural adviser to Trump, who has fundraised for Trump and previously gave tens of thousands of dollars to 2012 GOP nominee Mitt Romney.

Voters in rural areas and states with agriculture-dominant economies could be crucial to Trump's electoral chances this fall, as he bets big on Midwestern states to help him win the White House in November.