The fourteenth amendment failed because the republicans rallied to defeat it the supreme court ruled it unconstitutional ten southern states voted against it the democrats rallied to defeat it andrew johnson campaigned against it

The correct answer is
the delayed passing of the 14th amendment can be attributed to two factors;

Initially, Andrew Johnson opposed it and campaigned against it. he even used veto powers to bring down the moderate's bill,arguing instead that the constitution could not be changed without the input of the southern states. in addition, no democrats from the southern states supported the bill.

It might be the second one