Senate Minority Leader Mitch McConnell is raising money off of his opposition to military intervention in Syria, according to an email his campaign sent Tuesday to supporters.

"Mitch made it very clear to me from the beginning that he does not politicize issues of national security," the email from campaign manager Jesse Benton begins, before asking for a donation to McConnell's re-election campaign.

McConnell was the only one of the top four congressional leaders to oppose intervention in Syria, and he did not announce that opposition until Tuesday, when it first appeared that the resolution authorizing those attacks was being put on hold while the international community works toward a diplomatic solution to Syria's stockpile of chemical weapons.

McConnell likely felt indirect pressure from his fellow Kentucky senator, Republican Rand Paul, one of the most visible congressional critics of military action, who staged his own response to President Obama's Syria speech Tuesday night.

McConnell is facing a tough campaign in 2014, including a threat from a conservative challenger in the Republican primary race.