1. Voters are disillusioned with the mud-slinging campaigns run by many candidates in recent years.
    选民们对近几年很多候选人在竞选活动中互相诋毁深感失望。

2. After umpteen months of caucuses, by-elections, primaries, media speculation and mud-slinging, the American Presidential Nomination season is over.
    经过数月的政党会议、递补选举、初选、媒体猜测、言论攻击，美国总统提名期已经结束。

3. mud-slinging是什么意思

3. The young candidate was victimized by the vicious mud-slinging tactics of his opponent and had to drop out of the running.
    这位年轻的候选人受其对手恶意诽谤的手段的伤害，不得不退出竞选。