What did the aztecs have to them see where to establish their city?

The Aztecs had a legend that when they saw an eagle sitting on a cactus holding a snake, that was where to build their great city, Tenochtitlan (I think that's how you spell it). :) 
Hope this helps! Please let me know if I'm wrong. :)

Ian Eagle on a cactus with a snake

Explanation:

The president of the united states does not have the authority to “limit” the power of the judicial branch. however, the president can influence the political direction of decisions made by justices on the supreme court through the nomination process when a position becomes available.i would say the best answer is that he can at least interpret the laws