After the election, I will compare the total campaign funding raised by all presidential candidates in 2024 and in 2020.

I will obtain the percentage growth by looking at the difference between these two numbers and see what proportion of 2020 that difference is. That is:

(total_2024 - total_2020) / total_2020 * 100

The lower bounds of the intervals in the answers available are closed, where as the upper ones are closed. For instance, if the result is exactly 25%, then the answer selected will be "25% - 50%".

I will be using Open Secrets
https://www.opensecrets.org/2024-presidential-race
I understand this site will probably not be up to date, but I do not expect that lag to be significant so as to produce different results, let me know if you have a better source that does not require manipulating tables.

In 2020, the presidential candidates raised $3,977.4 million.

At the time this market opened, the 2024 race had raised $229.9 million.

This market closes the day after the general election.