As a late entry into the crowded, expensive, presidential campaign, Fred Thompson's first big test of viability will be his ability to raise money quickly. A major part of the former Tennessee senator's strategy is a heavy reliance on the Internet to get his message out and to raise funds. He is also trying to tap into the large number of well-heeled Republican financiers who have yet to commit to a 2008 hopeful, amid widespread disaffection among party loyalists with the current field.