By Trevor Hunnicutt MYRTLE BEACH, South Carolina (Reuters) -Vice President Kamala Harris on Saturday marked the Jan. 6, 2021, attacks on the U.S. Capitol with remarks in South Carolina, where the state’s Democratic primary will be held on Feb. 3. Harris spoke on the anniversary of the deadly attacks after Biden offered scathing criticism of Republican frontrunner Donald Trump’s actions that day in a speech near Valley Forge, Pennsylvania, on Friday. The vice president delivered the keynote address at the 7th Episcopal District AME Church Women’s Missionary Society annual retreat in Myrtle Beac…