The practice in which members of Congress agree to vote for a bill in exchange for their colleague's vote on another bill is called .

This practice is called "logrolling." Logrolling occurs when legislators agree to support each other’s proposals for legislation. It is a common strategy used in legislative bodies to ensure that a particular bill has enough votes to pass. For example, if one member of Congress is in favor of a certain bill that addresses funding for education, they may agree to vote in favor of another member’s bill that involves infrastructure development, which they otherwise might not support. This mutual exchange often helps to build coalitions and increase the likelihood of passing various legislative items that might not otherwise have enough support on their own. Logrolling highlights the collaborative yet complex nature of legislative processes where compromises are often necessary to achieve broader policy goals.