You have never heard such pronouncements? Pretty much every foreign policy speech by an American president involves talk of spreading freedom and democracy. Here for example is President Bush in 2005: 'Bush, putting Mubarak on the spot, delineated what he would consider acceptable conditions for elections in Egypt: "freedom of assembly, multiple candidates, free access by those candidates to the media and the right to form political parties."' http://www.washingtonpost.com/wp-dyn/articles/A16510-2005Mar...

Here are some Obama quotes from recent State of the Union speeches: "We will reward good governance, work to reduce corruption, and support the rights of all Afghans -- men and women alike." (2010) "In the Middle East, we will stand with citizens as they demand their universal rights, and support stable transitions to democracy." (2013)