The correct answer to this open question is the following.
Although the answer could have some in-betweens arguments, I think the New Deal weakened the strict concept of Capitalism.
1.- New Deal original conception was to help the poor American people. This is not a goal of Capitalism.
2.- New Deal tried to create legislation and economic programs to give temporary jobs to citizens that lost their jobs due to the Great Depression.
3.- Democrats' ideas to invest money in social programs for the benefit of the common citizen, is not a characteristic of Capitalism or the Republican platform.
However, I believe the New Deal was good for America during the Great Depression. Although controversial for some, the New Deal had a positive impact on America because the economic situation was the worst in the history of the United States.
The New Deal was the series of economic programs and legislation created by President Franklin D. Roosevelt as a result of the Great Depression that started on October 29, 1929, after the US stock market crashed.
The federal government created the Social Security Administration, the Tennessee Valley Authority Act, the Work Progress Administration, the Social Security Act, and the Civilian Conservation Corps.