Sen. Markwayne Mullin, R-Okla., shared a health update regarding his son, Andrew, who has been at the Mayo Clinic in Rochester, Minn., as doctors try to determine the cause of a possible mystery ...

As the junior senator from Oklahoma, Sen. Markwayne Mullin (R-OK), 47, has amassed an unusual level of clout in a chamber that values seniority. The former MMA fighter and father of six has found ...