Complex sentence: Logrolling is a colorful phrase that refers to trading favors, a synonym to "quid pro quo", for instance to describe vote trading by legislative members to obtain passage of actions of interest to each legislative member.
Split into simpler sentences: Logrolling is a colorful phrase that refers to trading favors, a synonym to "quid pro quo". For example, it may describe vote trading by legislative members to obtain passage of actions of interest to each legislative member.