The correct answer to this open question is the following.
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One cause behind the push for a new federalism was a perceived increase in demands, where the federal government required states to do something without giving them the money to implement it.
That is why new federalism included more autonomy and power for the states, so each state could attend and resolve its own problems and issues. according to its own necessities and characteristics. This was more evident after the New Deal programs implemented by President Franklin D. Roosevelt when he became President of the United States during the Great Depression years.