WASHINGTON (AP) — From the earliest days of his first presidential campaign, Donald Trump aggressively challenged the pillars of Republican foreign policy that defined the party since World War II.He mocked John McCain's capture during the Vietnam War, validated autocrats with his platitudes, questioned longtime military and security alliances and embraced an isolationist worldview. And to the horror of many GOP leaders at the time, it worked, resonating with voters who believed, in part, that a bipartisan establishment in Washington had brokered trade deals that hurt American workers and recklessly stumbled into so-called “forever wars.”But Russia's brutal invasion of Ukraine...