Why does PAC money go so overwhelmingly to incumbents?
a) Incumbents are perceived as more likely to win reelection.
b) Incumbents have established networks and relationships with donors.
c) Incumbents have a track record of supporting policies favored by PACs.
d) Incumbents have greater visibility and influence over legislative outcomes.

PACs favor incumbents because of their higher chances of reelection, existing influence in Washington, and known policy positions that align with the PACs' interests.

Explanation:

PACs, or Political Action Committees, give most of their financial support to incumbents due to several strategic reasons. Incumbents often have a greater chance of winning reelection, giving PACs a safer investment for their interests. In addition, incumbents possess valuable experience and connections in Washington, including positions on important committees, which can influence legislative outcomes that PACs care about. Finally, incumbents have established voting records on national issues, making them a known quantity compared to challengers. This combination of likely electoral success, influence, and known policy positions makes incumbents attractive to PACs looking to support candidates who align with their interests.