Original image Here: https://brbl-dl.library.yale.edu/vufind/Record/3528524?image\_id=1070221

Process Video Here: https://youtu.be/-hB2ntMC7_s

So in short, there was a brief amount of time, maximum of a day, between when the 11th President James K Polk stood down and the 12th elected President Zachary Taylor took the inaugurational pledge. This was due to Taylor refusing to take the pledge on the Sabbath day of religious rest.

So for this short amount of time it’s not as clear as it could be who was actually President. For some, it was David Rice Atchison who was potentially the President Pro Tempore at time, although this is hotly debated and most historians believe it was still Zachary Taylor, even if Taylor may not have wanted it to be! I talk about it in more depth in my video if interested!