The Kerry campaign plans to make a 45 million dollar ad buy today in crucial swing states including Arkansas. The will run between now and Election Day in 20 states. The purchase is being timed to coincide with the end of the GOP convention in New York. Aides call it a down payment on their advertising strategy. Some spots will be on cable television and advertising geared toward minorities. The first spots will be broadcast in just ten states, which the campaign would not disclos. A campaign spokeswoman said the remaining ten states would be added between now and November Second. The campaign won`t say how much it will spend in each state, making it difficult to know which states it believes it can win and which states will see smaller amounts of money for other reasons, such as an attempt to make Bush defend his turf. --- dash -- The Democratic presidential nominee is targeting the oft-mentioned battleground states of Arkansas, Arizona, Colorado, Florida, Iowa, Louisiana, Maine, Michigan, Minnesota, Missouri, Nevada, New Hampshire, New Mexico, North Carolina, Ohio, Oregon, Pennsylvania, Washington state, Wisconsin and West Virginia.