A person (usually former slave) who farmed a leased portion of land during the Reconstruction era. The planter shared a portion of the crop grown as payment for land, rent, and supplies. Often the farmer under agreement was taken advantage of by the land owner. Who is he?

He is a sharecropper.

Explanation:

A sharecropper was a farmer who provided part of his crop as a form of payment, either for land, rent or supplies, as explained in the example.

It derives from the term sharecropping, which is a form of agriculture in which an individual is allowed to use part of a landowner's land given that he/she gives part of the crops for payment.

he government should regulate the economy

roosevelt, a progressive reformer, earned a reputation as a "trust buster" through his regulatory reforms and anti-trust prosecutions. his "square deal" included regulation of railroad rates and pure foods and drugs; he saw it as a fair deal for both the average citizen and the businessmen.