The nomination of candidates for President is an example of the influence of which group or entity in the interpretation of the Constitution?

1. the executive branch

2. Congress

3. the courts

4. political parties

Option 4. Political parties.

Explanation:

The presidential primaries (where the first candidates are elected) are a vital part of the US electoral process. And since nothing about them is laid on the constitution, it's up to the state governments to regulate them.

It's in this phase, where the political parties promote their candidates for the final elections, where only 2 candidates can participate.