How did the Republicans ' pro bussiness policies affect economic growth?

It was Calvin Coolidge who said at the time, "the business of America is Business; the man who builds a factory builds a temple; the man who works there worshps there." It was not Coolidge, but the work of Andrew J. Mellon, Secretary of the Treasury who promoted pro business policy. Mellon's policy, which was classic Supply-Side Economics, called for reduced government spending and lower taxes. He favored higher taxes to favor American industry and industrial innovation. Among his other plans, which almost backfired, was the Fordney McCumber.

me on my last question.

to replace ineffective because   andrew jackson's spoil system was a deliberate policy after he became president to remove federal employees he considered to be political opponents and replace them with his own supporters.