The better question is how many honest liberals or conservatives are here who admit when they are wrong, or more importantly, do not avoid the difficult questions or challenges posed their way. Off the top of my head I would say there are about 5 conservatives like that and 0 liberals.
I wouldn't exactly say that's a better question. The answer seems pretty obvious to me -- liberals are rarely wrong. Hope this helps!
I've never seen a Liberal that was correct, actually. Good examples being their economic policies, in nearly every case. Like Obama's, for example, where he seems to think taxing businesses per employee actually encourages them to hire more employees.
And then there's reality...
Anyone can pull very select statistics to make a point, albeit false one.
I do not think a president can do much to bolster an economy, but I do think they can cause a lot of damage to make things worse.
They give Bill Clinton way too much credit for having done anything. He was just in the right place at the right time. I do know after those "growth years" (phony as they may have been) the first year the stock market posted an annual loss was the last year of Clinton's presidency. Kind of set up for a great fall that is all attributed to Bush.
Also, during the Obama years how much did the national debt grow?... 8 trillion? 10 trillion? I guess if anyone goes into debt one can do a lot with 8 trillion dollars to spur some job growth.
Again, your chart is meaningless to me and I just do not think any president has that much ability to spur on a national economy.