Question

How do political parties affect the structure or processes of Congress?

Answer 1

If a certain political party controls majority of the seats in either the House, Senate, or both, whether or not a bill passes is usually partisan.

Answer 2

Answer:

Influence on  decision-making power

Explanation:

The political parties in the congress are constantly fighting each to other for the achievement of their convictions through the vote, in this order of ideas the decision-making power would depend of the quantity of senators per political party, if there are many senator in an specific party the election process will be influence in a mayor measure  by those votes.