In a three-way general election matchup, Ross Perot has moved to a clear lead over both President Bush and Gov. Bill Clinton in the latest Gallup Poll.

In the telephone poll of 815 registered voters nationwide, conducted June 4 to 8, Mr. Perot was supported by 39 percent, Mr. Bush by 31 percent, and Mr. Clinton by 25 percent. The poll had a margin of sampling error of plus or minus four percentage points.

In a previous Gallup matchup in late May, Mr. Bush and Mr. Perot were tied at 35 percent each, while Mr. Clinton was supported by 25 percent.

No previous independent or third party candidate has ever placed second, much less first, in nearly six decades of Gallup's nationwide polling for President