Felipe Calderón was elected in 2006 in a highly controversial election, but went on to see his approval ratings rise on account of his aggressive war on Mexico's powerful, wealthy drug cartels. When Calderón took office, a handful of cartels controlled the shipment of illegal drugs from South and Central America into the USA and Canada. They operated silently, raking in billions. He declared war on them, busting up their operations, sending army forces to control lawless towns, and extraditing wanted drug lords to the US to face charges. Although arrests were up, so was the violence that had plagued Mexico since the rise of these drug lords.