I think it is far more common for sitting VP's to fail than to succeed when running for President
You’re not looking at true Pro-American Presidents vs. the rest.
Truly pro-American Presidents are wildly popular but they are rare.
Reagan was truly pro-American, wildly popular, and his VP, Bush, a shoe-in for the next presidency.
1st-term Trump was truly pro-American, wildly popular, and his VP, Pence, a shoe-in for the 2024 presidency.
One good thing about the screwed-up 2020 election was it outed Pence.
So if you don’t make the distinction between truly pro-American visionary Presidents vs. the ho-hum rest, you’re missing it.
Trump’s VP will be a very big deal and will be the favorite for the 2028 election, so he better damn well be a true American Patriot who’s ready to do battle with the treasonous Left.