DeWayne Burns remembers the time Governor Greg Abbott came to visit in 2015. Burns, the Republican representative of a district encompassing several small towns south of Fort Worth, had gathered dozens of clergymen at the Heights Church, in Cleburne, for a summit on the Pastor Protection Act, which allowed faith leaders to refuse to perform same-sex marriages, to hear from Abbott and pray for him. That was the only time Burns can remember Abbott visiting his district before this year. But this year, Abbott has dropped in twice (with another visit planned this week), to campaign for Burns’s primary challenger, Helen Kerwin.Kerwin, a self-proclaimed “Proud Mom,” “Prouder Gramma,” and “Freedom Lover,” has also gained the support of former president Donald Trump, Senator Ted Cruz, Lieutenant…