State Primary Elections
This was a big government solution to getting candidates on the ballot, especially ones which special interests could finance and control.
Previous to this, it was generally local, state, and national associations and conventions where delegates gathered, promoted and selected candidates for a particular political association or party.
The State Primary election process pretty much got rid of that, as very often one candidate or another was selected through the State Primary elections, rendering the convention process for the most part a mere formality rather than substantative.
It is just one more act on behalf of big government to push local citizenry out of the process of selecting and being able to determine the candidates for the general election that could be free of the big money used to promote a candidate to the public—usually through meaningless promotions based more on platitudes than substance. Seldom under this process can we actually vet the candidates.