COLUMBIA, SC (WIS) - Two candidates aren't taking a break this Labor Day.
Marco Rubio taking is part in a Tim Scott Town Hall in North Charleston Monday evening and that morning, former Pennsylvania Senator Rick Santorum will be walking in the Chapin Labor Day Parade.
That small town parade sets the pace for campaigning each election cycle.
And one more candidate has filed for the Palmetto State's First in the South Primary.
Senator Lindsey Graham submitted his paperwork Tuesday.
The primary requires a unity pledge - meaning each candidate vows to support the eventual GOP nominee.
Donald Trump, the Republican frontrunner who flirted with the idea of running as an independent- was quiet on the issue, until now.
The Donald signed a pledge Thursday.
One thing to keep in mind though, this pledge isn't binding.