The 14th amendment was not passed until the late 1860s. The Natural Born citizen clause was included in the original Constitution passed in 1787. The former can hardly govern the latter. Oh it could if it said "All persons born in the US are Natural Born Citizens" or something similar. It says only that they are citizens. The 14th thus did not change the definition of natural born citizen, which remains what it was in 1787.
Before any amendment to the Constitution is ratified, the law of the land operates in a different way but the amendments then alter the original document. For example, the Founding Fathers did not believe in direct popular election of Senators but the 17th Amendment changed that.
The 14th Amendment changed the rules on citizenship to two categories ONLY: born citizens and naturalized citizens for every American including those who might be elected President.
The 14th amendment was not passed until the late 1860s. The Natural Born citizen clause was included in the original Constitution passed in 1787. The former can hardly govern the latter. Oh it could if it said “All persons born in the US are Natural Born Citizens” or something similar. It says only that they are citizens. The 14th thus did not change the definition of natural born citizen, which remains what it was in 1787.