President Bush and John McCain have had their differences, but it looks like they’re putting any hard feelings aside.

Bush endorsed McCain today after the Arizona senator clinched the Republican presidential nomination by getting the required number of delegates last night.

And on MSNBC PA Senator Arlen Specter weighed in with Brian Williams.

“I think what Senator McCain has to do is just be himself,” said Specter.

When Williams asked Specter what’s going to happen with the Democrats in PA he said, “It’s too close to call.”

The Senator also added that he thinks the possibility of an Obama/Clinton or Clinton/Obama “dream team” ticket is possible.