Kylie Cooper / REUTERS Donald Trump’s choice for the next Homeland Security Secretary has cultivated quite a prolific investment portfolio during his time as a government official. Oklahoma Senator Markwayne Mullin, whom President Trump, 79, handpicked to replace Kristi Noem as head of the Department of Homeland Security, has made millions via stock trading since he was first sworn into Congress in 2013, according to a report from The New York Times . Read more at The Daily Beast.