(Corrects television attribution in paragraph 3 to say NBC not ABC) WASHINGTON (Reuters) – Russia could invade Ukraine within days or weeks but could still opt for a diplomatic path forward, White House national security adviser Jake Sullivan said on Sunday. “We are in the window. Any day now, Russia could take military action against Ukraine, or it could be a couple of weeks from now, or Russia could choose to take the diplomatic path instead,” Sullivan, who gave a round of television interviews, told the “Fox News Sunday” program. Any possible Russian action could include annexing Ukraine’s …