FACTBOX Key 2008 U.S. presidential events

(Reuters) - Here is a calendar of key dates in the 2008 U.S. presidential race:

MAY

* May 13: West Virginia

* May 20: Kentucky, Oregon

JUNE

* June 1: Puerto Rico

* June 3: Montana, South Dakota

AUGUST

* August 25-28: Democratic National Convention in Denver

SEPTEMBER

* September 1-4: Republican National Convention in Minneapolis-St. Paul, Minnesota

NOVEMBER

* November 4: Election Day

Source: National Association of Secretaries of State

(To read more about the U.S. political campaign, visit Reuters "Tales from the Trail: 2008" online at blogs.reuters.com/trail08/)

(Writing by Paul Grant, Washington Editorial Reference Unit; Editing by Bill Trott)