In a late-night rant on his Truth Social platform, Donald Trump pushed back hard at reporting that he froze up during a speech to NRA members in Dallas on Saturday night. The former president’s mental state was once again questioned all through Sunday after what was described as yet another Trump “glitch” during a high-profile speech where he seemed to lose his train of thought and stood at the lectern grimacing and looking about. After midnight on Sunday he pushed back at the media and President Joe Biden’s campaign for highlighting his apparent inability to carry on as the assembled gun owne…