Fading support for reconstruction was preceded by

a renewed interest in the south among northerners.

a democratic candidate becoming president in 1868.

the panic of 1873 and major economic problems.

infighting and disagreements among democrats.

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the Panic of 1873 and major economic problems.

Explanation:

The panic of 1873 or economic crisis of 1873 is the name by which a wave of economic panic in the United States is known for the bankruptcy of the bank Jay Cooke and Company, of the city of Philadelphia, on September 18, 1873, next to the previous fall of the Vienna Stock Exchange on May 9, 1873. It was one of the series of economic crises that hit the economic life of the latter part of the nineteenth century and the beginning of the twentieth. It was the start of a severe economic depression of global reach, known as the Great Depression of 1873, which lasted until 1879, coinciding with the start of the Second Industrial Revolution. It is the first of the great depressions or systemic crises of capitalism.

the authority to tax.

demand is the need and oportunity to buy a given good or service.