LOGROLLING

To exchange political favours.

To combine legislative items, either or both of which might fail on its own, into a single bill that is more likely to pass.

"Republicans defeated Democratic efforts to logroll hate crimes legislation into the defense appropriations bill."

To roll a log in a body of water, while balancing on it; to birl.

The rolling of logs from one place to another; an occasion when people meet to help each other roll logs.

(US politics) A concerted effort to push forward mutually advantageous legislative agendas by combining two items, either or both of which might fail on its own, into a single bill that is more likely to pass.

Mutual recommendation of friends' or colleagues' services or products, such as book recommendations in literary reviews.