There isn't much "liberal" about Obama restricting civil liberties, continuing the use of torture, continuing the use of spying against American citizens without warrants, stepping up the assassination of leaders abroad (without trying them in a court) and killing civilians around the world. Perhaps the only difference between Democrats and Republicans is the number of people killed; Bush had the chance to kill more Iraqis, Clinton fired missiles on a Sudan factory in Aspirin, Obama prefers to use drones to kill Afghans, Yemenis, Somalis and Pakistanis.
http://www.washingtonsblog.com/2012/04/obama-has-prosecuted-...
If you just happen to be an 18 year old male kid in an area and Obama wants to bombya, you're not a dead civilian, you're a dead militant. Previously they would assume that you're a militant unless proven otherwise. Now 18 year old male is a proven militant by definition.
http://www.juancole.com/2012/05/how-obama-changed-definition...