Answer:
It is an example of vote trading or logrolling
Step-by-step explanation:
Logrolling consists in the exchange of favor with the aim of mutual benefit. One type of logrolling is vote trading which in this example refers to an exchange of votes in the legislature so that both legislators benefit.
Rep. Smith will probably be able to secure the passage of more funding for his district in exchange for voting to secure the passage of Rep. Hall's bill.