Clark did not dump Hillary..When she conceded he supported the nominee.

Bush nor McCain got behind the new GI Bill. He even spoke of why he didn't. Bush did lie when he
signed it though and gave McCain credit for it.
It doesn't debunk anything.

Spin is spin.

The new bill was introduced into congress by bipartisian legislators.

http://abcnews.go.com/Politics/story?id=4652517&page=1
Truth is right above at the link.