Complex sentence: Taibbi became a Contributing Editor at "Rolling Stone", penning feature-length articles on domestic and international affairs, along with a weekly political online column titled "The Low Post" for the magazine's website.
Split into simpler sentences: Taibbi became a Contributing Editor at "Rolling Stone", writing feature-length articles on domestic and international affairs. He also wrote a weekly political online column, titled "The Low Post," for the magazine's website.