NEWARK, Ohio — Calling it a “Father’s Day I’ll never forget,” Mitt Romney, his wife and two of their five sons wooed voters across rural Ohio today, promising “a fair shot” for everyday Ohioans. The presumptive Republican presidential nominee, spending his ninth day this year in this must-win state, delivered just a 9-minute speech, at times shouting above a small but very loud band of hecklers on courthouse square.