They called their home state "Hillary Country," in reference to presidential candidate Hillary Clinton's and former President Bill Clinton's history of working in the state.

"They moved our Arkansas primary, which was typically in May, to March, and (Rachel's 18th) birthday is in April, so she doesn't get to vote in the primary," Nikki Martin said.

She said she helped her daughter learn more about Sanders' platform as his name recognition grew during the primary season.

"The GOP platform has moved so far to the right, and it's scary," she said of the candidates on the other side of the aisle. "They focus so much on the evangelical vote and turning this country into a theocracy.

"Then you have Hillary, whose pockets are deep in Wall Street and the bankers, so that's not good for our country, either.

"Bernie's platform is the best that I've seen in my many years of voting as far as what it will actually do to help the people of this country. His economic policy is the best by far."

Rachel Martin said she likes Sanders' plans to reduce the cost of higher education — which Nikki Martin said "appeals to Mom, also."