Final answer:
Presidents can improve their chances of obtaining party support in Congress by increasing the number of party members, leveraging the coattail effect, and using their popularity to gain attention on issues.
Step-by-step explanation:
One way for presidents to improve their chances of obtaining support in Congress is by increasing the number of party members in the legislature. This can be done by raising funds for the party, campaigning for candidates, and supporting preferred candidates in primary elections.
Another method is through the coattail effect, where voters cast their ballots for congressional candidates of the president's party because they support the president. This increases the popularity and chances of retaining office for members of the president's party.
Lastly, presidents can use their popularity to increase media and social media attention on an issue, which can potentially lead to change even if the president is not directly responsible for congressional action.