“It’s very rare you go back a generation," Stevens said.

In a Quinnipiac University poll released earlier this month, Clinton dominated the Democratic field, garnering the support of 65 percent of potential primary voters. The next closest candidate, Vice President Biden, earned 13 percent, with New York Gov. Andrew Cuomo rounding out the top three at 4 percent.

In a highly circulated op-ed piece written in February, Stevens argued Republicans would benefit in the coming election because of the age of their top presidential candidates.

"For 2016, the Democrats seem headed toward a fight between Hillary ClintonHillary Diane Rodham ClintonWoman behind pro-Trump Facebook page denies being influenced by Russians Trump: CNN, MSNBC 'got scammed' into covering Russian-organized rally Pennsylvania Democrats set to win big with new district map MORE and Joe BidenJoseph (Joe) Robinette BidenDems ponder gender politics of 2020 nominee Trump: Why didn't Obama 'do something about Russian meddling?' 2020 Dem contenders travel to key primary states MORE. Both launched their careers in the 1970s; what will their slogan be, “Another Century of Service”?" Stevens wrote. 

"On our side, we have Paul RyanPaul Davis RyanRepublicans are avoiding gun talks as election looms The Hill's 12:30 Report Flake to try to force vote on DACA stopgap plan MORE, Nikki Haley, Marco RubioMarco Antonio RubioColbert: Students taking action on gun violence 'give me hope' Lawmakers feel pressure on guns Florida lawmaker's aide fired after claiming shooting survivors were 'actors' MORE, Chris Christie, Jeb Bush, Susana Martinez and more. Who has the best opportunity to win that generational battle?"