I agree HughRG. The difference between the civilian casualties caused by Bush and Obama is that the ones caused by Bush were in the open and obvious. When you invade Afghanistan (2001) and Iraq (2003) it's relatively clear that civilians are dying.

Obama worked it differently. His drone program operates in secret. He didn't invade Libya in 2011, he just bombed it into regime change. And in Syria, he chose not to invade but to use terrorist groups to do the work for him. I understand hundreds of thousands of people have died in Syria, while millions more have been displaced. That's on Obama, and I too doubt that Bush did worse.