What to know about Markwayne Mullin, Trump's new Homeland Security pick

Sen. Markwayne Mullin (R-Okla.) is poised to be the next Homeland Security Secretary, replacing Kristi Noem, President Trump announced Thursday. Why it matters: Mullin is a staunchly MAGA firebrand and will likely be in lockstep with Trump's immigration agenda. What they're saying: "Markwayne will work tirelessly to Keep our Border Secure, Stop Migrant Crime, Murderers, and other Criminals from i