Radio personality Herman Cain takes the stage to address the Conservative Political Action conference (CPAC) in Washington, on Feb. 11. Mr. Cain is the former chairman and CEO of Godfather Pizza and hails from Atlanta. He briefly ran for President in 2000, and ran for Senate in 2004. In September, Cain won a surprise victory in a Republican presidential straw poll in Florida, beating rival Rick Perry. Jonathan Ernst/Reuters/File
Herman Cain gets a hug from a supporter as he campaigns at the Iowa State Fair in Des Moines, Iowa, on Aug. 12. Mr. Cain has trademarked his presidential candidacy as 'The Hermanator Experience.' Charles Dharapak/AP/File
Herman Cain shakes hands with Sean Hannity of FOX News at the Iowa State Fair in Des Moines, Iowa, on Aug. 12. Charles Dharapak/AP/File
Herman Cain speaks to supporters in Cedar Falls, Iowa, on Aug. 9. Brandon Pollock/Waterloo Courier/AP/File
Susan Burnett (r.) and Kathy Zavadil, both from St. Petersburg, Fla., walk past Republican presidential candidate Herman Cain's bus in Belleair, Fla., on Sept. 19. The pair drove up from St. Petersburg to hear Mr. Cain speak about his economic plan. Tyler Tjomsland/St. Petersburg Times/AP/File
Herman Cain visits the Western Wall, the holiest site where Jewish people can pray, in Jerusalem's Old City on Aug. 24. Bernat Armangue/AP/File
Joan Lenahan (l.) cheers at a rally as Herman Cain announces his run for Republican candidate for president in Atlanta on May 21. David Goldman/AP/File
Herman Cain speaks to the Georgia Republican Party at the party convention in Macon, Ga., on May 14. Grant Blankenship/The Macon Telegraph/AP/File
Herman Cain arrives to speak at a rally by home school advocates at the Statehouse in Des Moines, Iowa, on March 23. Charlie Neibergall/AP/File
Herman Cain gives the thumbs up during a break in a Republican presidential debate in Tampa, Fla., on Sept. 12. Mike Carlson/AP/File
For Microsoft and other US tech companies, a lawsuit over e-mails stored in Dublin is an important test case to demonstrate their willingness and ability to guard customer data from government prying in a post Snowden-era.
ByJaikumar Vijayan, Correspondent
A dispute between Microsoft Corp. and the Department of Justice over e-mails stored on a Microsoft server in Dublin could end up reshaping US electronic privacy laws and defining the limits to which domestic statutes are applied abroad.