Republican presidential candidate John McCain has embarked on a "Service to America Tour" to highlight his and his family's background of military service.

Democratic Party presidential candidate Senator Hillary Clinton says she is in no rush to end her hard-fought race for the party's nomination.

Democratic presidential candidate Barack Obama has indicated he would have left his Chicago church if his long-time controversial pastor had not retired.

A new opinion survey shows Democratic presidential candidate Barack Obama continues to maintain solid support among voters, while opponent Hillary Clinton has seen a drop in her popularity.

U.S. Senator Hillary Clinton says she "misspoke" about an arrival in Bosnia 12 years ago, when she was first lady of the United States and said she landed under sniper fire and had to run to the waiting vehicles.

Technology has changed the way presidential candidates campaign for the White House. But their goal is the same as it has been since America's first presidential election: attracting voters to choose one particular candidate.

Democratic presidential contender Barack Obama's recent speech on race has drawn both praise and criticism. But even Obama's critics acknowledge that he made a serious attempt to discuss a difficult and divisive issue with roots in the very beginning of the American republic.

The U.S. State Department says the passport files of all three presidential candidates have been breached.

U.S. Secretary of State Condoleezza Rice says she has apologized to Senator Barack Obama after government contract workers accessed his passport file without authorization.

New Mexico governor Bill Richardson, a former presidential candidate, plans to endorse Democratic Senator Barack Obama for president.

A make-up Democratic Party presidential primary is now less likely to happen in Michigan, after state legislatures adjourned Thursday's session without taking up the issue.

Some new public opinion polls suggest a close and volatile presidential race in the months ahead.