A system of forced labor imposed on the natives of Spanish America and the Philippines is known as the Repartimiento system.
In some form, it was just similar to the tribute-labor system of the Inca Empire or the Ancien Régime France.
It was a system in which the local population was required to give their labor for the colonial leaders in mines, workshops or farms without pay for some days in a year.
Basically it's a key to candidates because it is considered to influence the overall result of the president election. Democratic and Republicans both have a good chance to gain a win.