There are so many factors that caused their decline, but I would say the main one would be the presidency of John Adams. John Adams made some major mistakes such as enacting the Alien and Sedition Acts, which basically took away the freedom of speech. This for sure made many people upset. Since John Adams was connected to the Federalist party, their reputation would tank. Soon, events like Alexander Hamilton's death, the Louisiana Purchase, and Hartford Convention made them die out.
Reducing the national deficit
The main problem that the New Deal addressed was the Great Depression, which caused massive unemployment within the country.
To face the depression, Roosevelt chose to not doing the traditional approach, but he took a gamble to cure the root of the problem heads on.
He created several welfare that created to provide job opportunities for the people, not giving them direct helps. By this opportunities, he gave the people various ways to survive and take care of themselves so they don't have to rely on the government
Hope this helps
is there a little bit of more information
ok first of all his name is not jesus jesus is zeus the messhiach in the sriptures is yahoshuwah there are many parts to what he said but the three parts of learning is read learn and live