Senate confirmation hearings this week for President-elect Donald Trump’s nominees for top jobs – from secretary of state to attorney general – should provide a test of his ability to work with fellow Republicans in Congress to enact his agenda. Trump’s challenge is to ensure the 100-member Senate’s 52 Republicans stick together to confirm his Cabinet choices to provide a smooth transition to power when the real estate magnate takes over from Democratic President Barack Obama on Jan. 20. A total of seven confirmation hearings are expected this week, starting on Tuesday with hearings for U.S. Senator Jeff Sessions on his bid to become attorney general and a session for retired Gen.