Final answer:
The McGovern-Fraser Commission resulted in significant reforms to the Democratic Party's delegate selection process, including affirmative action guidelines and increased use of primaries and caucuses, which democratized presidential nominations.
Step-by-step explanation:
The reforms instituted by the McGovern-Fraser Commission were a response to concerns about the undemocratic nature of party politics, particularly the process of selecting presidential candidates. The commission was established by the Democratic Party after the contentious 1968 Democratic National Convention, with the aim of making the delegate selection process more open and representative. Among the reforms were the implementation of affirmative action guidelines to ensure that women, minorities, and young people were adequately represented among delegates. In addition, the commission pushed for more primaries and caucuses to involve rank-and-file party members in the nomination process, thereby reducing the control of party elites. The changes fostered by the McGovern-Fraser Commission have had a lasting impact on how presidential nominees are selected in the United States.