Authorities say threatening letters -- one containing an unidentified white powder -- were sent to Sen. John McCain's campaign offices in Colorado and New Hampshire.
More RNC Coverage | Veepstakes Interactive
Some scheduled speakers at the Republican National Convention could be on John McCain's short list of running mate picks. So why are some conservatives nervous? More
The Democrats Meet In Convention In A Little Over Two Weeks. CNN Deputy Political Director Paul Steinhauser And CNN's John Lisk Talk About A Little Disagreement Over Hillary Clinton At The Convention. Listen
John McCain's Ad Comparing Barack Obama's Campaign To Paris Hilton Draws A Response From The Hotel Heiress. CNN Political Contributor Roland Martin And CNN's John Lisk Take A Look Listen
CNN Deputy Political Director Paul Steinhauser And Bill Caiaccio Discuss Why Vice President Dick Cheney Might Not Be At The Republican Convention. Listen
Hearst-Argyle Television stations nationwide continue an aggressive commitment to our viewers with award-winning political news coverage we call Commitment 2008. More
