Washington (AFP) – Is Donald Trump still the ultimate power player in the Republican Party? That question is unanswered after mixed results for candidates endorsed by the former president in key primary elections across the United States. In the wake of Tuesday’s contests to choose candidates to run for Congress or state governorships in November, Trump took to his own Truth Social — which he launched after being barred from Twitter — to emphasize the positive. “A big night for Trump Endorsed candidates last night,” he wrote early Wednesday. Since the start of this month, when primary season…