Final answer:
Susan engaged in pocketbook voting, basing her decision on how the current political leadership has impacted her financial situation and opting for challengers over incumbents.
Step-by-step explanation:
The type of vote that Susan cast when she voted for every challenger on the ballot is known as pocketbook voting. This decision-making process is based on the voter's financial situation and how it has been affected by the current political leadership. Susan is influenced by her frustration with her economic situation, namely the difficulty she is experiencing in finding sufficient employment, and her belief that the current president and Congress are not adequately addressing her economic concerns has led her to vote for the challengers.