How can the Constituency influence voting behaviour within Congress?

-Because of the frequent election cycle, the public opinion is influential in many Congressional people. This can make them more influenced by the people rather than the party leader. -Sometimes the Incumbent, and their opponents, highlights the individual voting record in electoral campaign, revealing they had opposed Party Lines to support their Constituency. 11 Republicans voted against Trumps proposal for a Border Wall. -Pork-Barrell politics can also be seen as an indicator that Constituents really do influence the Congressional voting behaviour