Who was the first female president?

This text appears to answer the hypothetical question of whether the office or merely the powers of the presidency devolved upon the Vice President on his succession. Thus, the 25th Amendment merely restates and reaffirms the validity of existing precedent, apart from adding valuable new protocols for presidential disability. But, of course, not everyone agreed with this interpretation when it was first put to the test, and it was left to John Tyler, the first presidential successor in U.S. history, to establish the precedent that was respected in the absence of the 25th Amendment.