Logrolling refers to the exchange of voting favors among government legislators. For example, Lawmaker A agrees to vote in favor of Lawmaker B's bill, as long as Lawmaker B votes in favor of Lawmaker A's bill.
Logrolling frequently involves local projects, where legislators want federal money to fund road work or housing development in their area. Critics of the process accuse these lawmakers of putting their own local interests before the greater good of the country. They also assert that logrolling practices lead to increased government spending that benefits only one geographic area of the country at the expense of the entire population.