The '87 exploratory committee was formed because Clinton seriously contemplated a run in the '88 election. I remember searching around for some stuff a few years ago and finding a
Time article about Clinton and Gore running on a ticket together - and the story was published in 1987! I've read that Clinton really wanted to run that year and was expected to but the Gary Hart scandal prompted him to reconsider.
I did find a Google groups reference to the August 1991 exploratory committee:
http://groups.google.com/groups?q=clinton+august+1991+exploratory&hl=en&lr=&ie=UTF-8&oe=UTF-8&safe=off&selm=334FEB1B.4D9A%40globaldialog.com&rnum=1The reason I say the comparison is flawed is because
everyone started late in 1991, not just Clinton. There were no Democrats openly preparing presidential runs prior to the Gulf War that year, unlike the candidates this time. When the war boosted Papa Bush's approval rating to the 90% range, all the major, prospective candidates in the party - Bentson, Gephardt, Gore, Jay Rockefeller - pulled back and decided not to run. Only Cuomo postponed his decision until late in the year, ala-Clark this time. So that left what the media called the "second-tier" candidates - Clinton, Kerrey, Harkin, Wilder, etc. - and nearly all them announced around the same September/October 1991 time period. I wish there were one link I could send you to for this but you'd probably have to search around on the News Library site (
http://nl.newsbank.com/nlsite/) to get the exact dates.
The point is, in the context of the 1992 cycle, Clinton's start wasn't nearly as late as Clark's now.