Mark Halperin’s three things to watch for in politics for Wednesday, May 13.

1. Watch as President Obama travels west today. He leaves for Arizona late this afternoon to speak at Arizona State University’s commencement ceremony at 9:10 pm ET and will be in New Mexico tomorrow. This is his first big domestic trip since he hit the 100-day milestone. He’ll certainly get a lot of attention from media in the region, but watch to see how much coverage the president gets from the cable networks and the national press covers the president’s every move while he’s on this trip.

2. Watch for new developments on Obama’s Supreme Court pick. He’s meeting with a bipartisan group of key senators this morning to discuss the vacancy. Watch to see what details come out of that meeting. Start to focus not on the potential perils of the pick or the possibilities of interest group pressure, but on the possibility that the White House may have a pick up its sleeve that could benefit the president not only in his long-term legacy but do him short-term political good and electrify the nation.

3. Watch as the Republican Party continues to try to figure out who its best spokespeople are. Former Vice President Cheney and his daughter Liz were all over cable TV again yesterday. Watch to see if they choose to keep up their assault on Democrats and if the White House chooses to stay engaged in the continued back-and-forth. Also watch to see who else might emerge as a strong voice for the GOP.