Oklahoma governor makes pick to replace Mullin in Senate 

Oklahoma Gov. Kevin Stitt (R) has appointed energy executive Alan Armstrong to represent the state in the Senate, replacing outgoing Sen. Markwayne Mullin (R), who was confirmed Monday to lead the Department of Homeland Security (DHS).   At a Tuesday press conference announcing the appointment, Stitt hailed Armstrong, a third-generation Oklahoman, as a “strong business leader…