Mark Halperin’s three things to watch for in politics for Friday, April 17.

1. Watch as President Obama continues on his Latin American trip. Today he leaves Mexico City for the Summit of the Americas in Trinidad and Tobago. Watch to see how much media attention it draws. So far this trip, the national press seems to be less interested in the region than it is in Europe. Watch to see what kind of message the president drives today and how much coverage he gets back in the United States.

2. Watch developments about the bank stress tests. The administration initially indicated that those results would not be revealed, then it was suggested they would be revealed. Now it appears the government is saying they’ll be revealed voluntarily by those banks that want their stress tests made public. Watch to see whether this change in direction is, in fact, the government’s intention or whether there’s another change in direction.

3. Watch to see what story emerges as the dominant issue of this weekend’s political conversations, in particular on the Sunday talk shows. No one story has dominated the week, so it’s unclear what will dominate the weekend, so watch to see what emerges today.