[MamaTexan]

In both his proclamation and in his message to Congress he makes it clear that the governor and legislature of Pennsylvania did not have a say in the matter

But even Washington, as great and honorable man that he was, could not trump the Constitution.

The States were sovereign in their own borders. Read it again.

[Non-Sequitur]

But even Washington, as great and honorable man that he was, could not trump the Constitution.

He wasn't.

The States were sovereign in their own borders. Read it again.

In most cases, yes. The Constitution gives the states pretty much a free reign within their own borders, and so long as they comply with the restrictions the Constitution places on them. But when their actions impact the interests of the other states, or when they are unable or unwilling to enforce the laws of the United States, then the Constitution gives the federal government the right to step in and enforce the Constituiton and the laws made under it. And that is what Washington, and Lincoln, did.