For the record: Why did CPD Select 15 Percent as the Polling Threshold for Inclusion in the Debates?

[ehrnst]

The Commission on Presidential Debates first adopted the 15 percent level of support criterion in 2000. Its initial adoption, and its adoption in subsequent cycles, was preceded by careful study and reflects a number of considerations. It was the CPD’s judgment that the 15 percent threshold best balanced the goal of being sufficiently inclusive to invite those candidates considered to be among the leading candidates, without being so inclusive that invitations would be extended to candidates with only very modest levels of public support, thereby jeopardizing the voter education purposes of the debates. Notably, the League of Women Voters struck the balance in the same way. Fifteen percent was the figure used in the League of Women Voters’ 1980 selection criteria, which resulted in the inclusion of independent candidate John Anderson in one of the League’s debates.

Prior to adopting the 15 percent standard, the CPD conducted its own analysis of the results of presidential elections over the modern era and concluded that a level of 15 percent support of the national electorate is achievable by a significant third party or independent candidate who captures the public's interest. In making this determination, the CPD considered, in particular, the popular support achieved by George Wallace in 1968 (Mr. Wallace had achieved a level of support as high as 20 percent in pre-election polls from September 1968); by John Anderson in 1980 (Mr. Anderson’s support in various polls reached 15 percent when the League of Women Voters invited him to participate in one of its debates); and by Ross Perot in 1992 (Mr. Perot’s standing in 1992 polls at one time was close to 40 percent and exceeded that of the major party candidates, and he ultimately received 18.7 percent of the popular vote).

The CPD's nonpartisan candidate selection criteria and 15 percent threshold have been found by the FEC and the courts to comply with federal election law. The same is true for the earlier criteria CPD used in 1988, 1992 and 1996.

http://debates.org/index.php?page=overview

[MineralMan]

1. 15 per cent also reflects Democratic Party policy for

delegates and conventions. For example, a primary candidate who doesn't get 15% of the vote gets zero delegates to the next level of the process. That cutoff point is standard both nationally and in state parties.

I have no idea what the Republicans do. I don't pay any attention to their rules.