Final answer:
Grover Cleveland, a Democratic president, attempted to bring about political and business reforms and lower tariffs.
Step-by-step explanation:
The democratic president, elected in 1884 and again in 1892, who attempted to bring about political and business reforms and to stop high tariffs was Grover Cleveland. In his first term, Cleveland advocated for lower tariffs, as he believed they protected big domestic industries at the expense of average consumers. He even won the support of the South, as lower tariffs would benefit farmers and exporters of U.S. goods.