The sizes of the platforms vary from election year to election year, but it's not unusual for a candidate to speak to the public about only one certain issue throughout the course of a campaign, said David Nice, political science professor at Washington State University.
"It's hard to tell what issues they will emphasize because the public has such a short attention span," he said.
But Sen. Edwards, D-N.C., who is rumored to have 2004 presidential aspirations, already has begun to build a platform on key political issues, including national security, the economy and, most recently, education.
Political pundits have mixed reviews about Edwards' stance, including his College for Everyone initiative, which would give students who work part-time their first year of college for free.
Ferrel Guillory, director of UNC's Program on Southern Politics, Media and Public Life, said Edwards' speeches are the foundations of a platform. "Of course this is part of his presidential campaign. It's critical for candidates like Edwards to articulate where they stand on important issues. We've already seen (Al) Gore step out front and critique Bush's economic and international policies."
Early polls show 2000 Democratic candidate Gore as the front-runner for the Democratic nomination, but all of the candidates are going to be looked at seriously by party leaders and by people participating in the primaries.
But Bruce Cain, political science professor at the University of California-Berkeley, said education initiatives like Edwards' plan are scapegoats because few U.S. citizens oppose improving education.
"Any federal candidate that picks education as their leading issue might as well put a sign in their forehead that says, 'I play it safe,'" he said.
The federal government provides only 3 percent of the funds spent on K-12 education and only makes direct contributions to higher education through financial aid such as Pell Grants.