Final answer:
Whips in the Senate and House are responsible for gathering, assessing, and reporting support for legislation among members.
Step-by-step explanation:
The officers in the Senate and House responsible for gathering, assessing, and reporting the degree of support or opposition for legislation among members are the whips. It is the whip's job to ensure party discipline, inform members of the leadership's position, and secure votes for legislation. They work closely with the majority and minority leaders who are the highest-ranking members of their respective parties in each chamber, but it is the whips who are particularly in charge of quantifying support and herding members for votes on legislative matters.