Article of the u. s. constitution establishes the powers and limitations of the presidency.

I go for Article II of the U.S Constitution, it talks about Checks and Balances. 

Cherokee  removal, part of the trail of tears, refers to the  forced  relocation between 1836 and 1839 of thecherokee  nation from  their lands ingeorgia, south carolina, north carolina, tennessee, texas, and alabama to the indian territory (present day oklahoma)  in  the thenwestern united states, and the resultant deaths