The halls of the State Department are haunted, not by actual ghosts, but by people who might as well be ghosts: whistleblowers, people who angered someone powerful and people who for one reason or another, can't be fired.

"People like me, that the State Department no longer wants, but for some reason can't or won't fire, are assigned to what we call 'hallwalking,'" says author Peter Van Buren.

The Kansas Jayhawks staged a dramatic comeback Saturday to defeat the Missouri Tigers 87-86. Never mind the exciting finish; this may the last time these two teams ever meet.

And it's not the only feud ending this season. College sports has now bid farewell to three of its very oldest rivalries.

Host Rachel Martin speaks with Nate Silver, who writes the FiveThirtyEight blog for The New York Times, about the mechanics of the GOP primary, the number of delegates apportioned so far and how future contests will determine the delegate count.

Michigan holds its Republican primary on Tuesday. The former Massachusetts governor, and Michigan native, Mitt Romney has been touring the state in search of votes. A week ago, Rick Santorum held a double-digit lead in the polls. Now, NPR's Ari Shapiro reports, Romney seems to have closed the gap.

The first phase of a wide-ranging trial for the 2010 Deepwater Horizon accident and oil spill in the Gulf of Mexico is scheduled to begin Monday. Host Rachel Martin talks with NPR's Debbie Elliott and Jeff Brady, who will cover the trial.

Transcript

RACHEL MARTIN, HOST:

This is WEEKEND EDITION, from NPR News. I'm Rachel Martin. In West Africa, the people of Senegal are voting for their new president today after days of violent street protests. The sitting president, 85-year-old Abdoulaye Wade, has been in power for 12 years, and he is seeking a third term in office. His opposition rivals say that's illegal, and they insist the president must go now.