Obama killing people

The Obama administration's targeted killing of American citizen has come again into question. Congress sent the president a memo, which was never responded too, nor has it even been acknowledged. Congress is now taking more drastic measures to get to the legal grounds of Obama's actions. Here is a link to the article. I don't know why the Obama administration would do this, its horrible. I also don't know why they would keep the american people in the dark. It seems like a ridiculous position to take under the circumstances. Obama is clearly a war president, yet this image of him is hardly portrayed in the media. It is also notable that Obama has charged more American's with treason than any other president in our history. Maybe times are hard, or maybe the administration is. It's hard to know without answers.