Organized labor and gender pay equity are the issues 1st Congressional District candidates have wanted to talk about most this week. They’re just not talking to each other.

Democratic challenger Elizabeth Colbert Busch plans to highlight the discrepancy of earnings between South Carolina’s men and women during a College of Charleston campaign event today.

Meanwhile, Republican Mark Sanford’s campaign continues to point toward Colbert Busch’s support for unions — in particular her receiving a $5,000 donation from the International Association of Machinists and Aerospace Workers International — the union that challenged Boeing’s South Carolina expansion.

“My opponent won’t ... address her ties to this union that has been completely antithetical to job growth in South Carolina,” Sanford, former governor, said in a statement.

As the two struggle to control the narrative before the May 7 special election, Colbert Busch has brushed off Sanford’s criticism by saying she supports Boeing and that unions are largely a state issue. Instead, she has emphasized that South Carolina women earn only 76 cents for every dollar a man earns.

“I am committed to making sure that women earn the same pay for the same work,” she said in a statement. “As I know firsthand, families wouldn’t be able to make ends meet without women earning a fair wage.”

Colbert will appear with her daughters, daughter-in-law and two granddaughters at 11 a.m. today for a “Working for the Weekend” conversation at the College of Charleston’s Higdon Student Leadership Center.

Sanford campaigned in Beaufort County on Friday and plans a stop there today before returning for the Charleston County GOP convention at Porter-Gaud School at 11:30 a.m.