Final answer:
Presidential candidates typically choose their vice presidential running mate as part of the national conventions, where the presidential nominee selects a partner to form the final ticket presented to the public. This choice is carefully considered to complement the lead candidate and becomes public knowledge often ahead of the formal announcement through media leaks and speculations.
Step-by-step explanation:
The process that presidential candidates use to choose a vice presidential candidate occurs in several steps during the national conventions of each political party. At the national convention, the presidential candidate officially chooses a running mate, which is traditionally the vice presidential nominee. This choice is often made after careful consideration and is rarely a surprise, as the candidate typically aims to select a running mate who will complement their political positions and appeal to a broad segment of the electorate.
In recent history, media has played a role in unveiling the potential vice-presidential picks even before the official announcements are made. For instance, in 2004, John Edwards' candidacy as John Kerry's running mate leaked through photographs before a formal declaration. Similarly, the speculation around Senator Kamala Harris being chosen by Joe Biden also made rounds before it was officially confirmed in 2020.
The national conventions serve as a platform for the parties to present their finalized ticket to the public and kick off the final phase of the presidential campaign leading up to the general election. It is important to note that the vice-presidential selection process is just one part of a wider and more complex nomination process that includes primaries, caucuses, and ultimately, the general election where people across the country cast their votes for one president and vice president.