the German chancellor, Angela Merkel, would not—or could not—endorse anything more than a political declaration that the euro zone is throwing its weight behind Greece.

the German chancellor, Angela Merkel, would not—or could not—endorse anything more than a political declaration that the euro zone is throwing its weight behind Greece.

endorse : publicly that you support or approve of them.
throw weight behind : ~을 지지하다. 지원하다.