COLUMBIA, S.C. — Vice President Kamala Harris appears to be traveling to Columbia Friday to accompany Congressman Jim Clyburn, D-S.C., as he files paperwork for President Joe Biden to appear on the South Carolina Democratic Party presidential primary ballot. Full details of the visit have yet to be confirmed, but Clyburn is scheduled to file Biden’s paperwork at 10 a.m. Thursday evening, Harris posted on X, the platform formerly known as Twitter, “South Carolina Democrats are the backbone of the Democratic Party. Jim Clyburn, got room for one more?” The South Carolina primary is particularly m...