President Barack Obama announces a staff shakeup Wednesday, naming U.N. Ambassador Susan Rice (right) to replace the retiring Tom Donilon. He also nominated former White House aide Samantha Power (left) to succeed Rice at the U.N. Alex Wong/Getty Images hide caption

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Susan Rice, U.S. ambassador to the U.N. Mark Garten / U.N. /UPI /Landov hide caption

itoggle caption Mark Garten / U.N. /UPI /Landov

Some Republicans are betting that President Obama won't push for a Susan Rice nomination if it could jeopardize negotiations with the GOP on things like the budget, or immigration. Andrew Burton/Getty Images hide caption

itoggle caption Andrew Burton/Getty Images