Ask this question again, you're going to need a more specific time the president has done this. however, if you are asking about WWI, the USS Lusitania, the Zimmerman Telegram, German U Boats targeting American ships, and so on.
The Romans and Jews helped spread Christianity
Johannes Gutenberg was a German blacksmith known for inventing the mechanical movable type printing press<span>. His </span>printing press<span> has been widely considered the most </span>important<span> invention of the modern era because it profoundly impacted the transmission of knowledge.
</span>Its immediate effect<span> was that it spread information quickly and accurately. This helped create a wider literate reading public.
</span>
answer
The President of the USA is not required to have ever held any office
or been elected to anything. A candidate's level of education or training
for anything is irrelevant, and it would be totally un-American to impose
any sort of religious test.
In fact, a candidate for president is not required to have any skills, talent,
ability, experience, or qualifications of any kind.
The only constitutional requirement is that the candidate will need to turn
35 years old by the time s/he takes office.