Democrat Bob Brooks, a longtime firefighters' union official running for Congress in a toss-up Pennsylvania district, berated union firefighters who also work as volunteer firefighters in their free time as "scab[s]" and "shitbags" in angry social media postings. His hostility to volunteer firefighters comes as many Pennsylvania communities depend on volunteers either because they can't afford unionized firefighters or because of a chronic firefighter shortage. Brooks, who is running neck and