What is a modern source of influence that has weakened political parties in Texas?

National politics

Explanation:

It is obvious that national politics is weakening not only the political parties in Texas, but all over the United States. More and more people prefers to read news about national politics than about local and state politics. While there are so many elected officials, the focus is always on the federal official. As a result of this, elections that takes place in recent times only operate as a single referendum on the biggest man (The President). This removes all importance from candidacy and places huge importance on party.