WASHINGTON (AP) _ Going even further than Independent Counsel Kenneth Starr, the chief Republican investigator for the House Judiciary Committee today laid out 15 offenses that could be grounds for impeachment of President Clinton.

In a much anticipated report before the committee's expected vote for a broad impeachment inquiry, David Schippers said there was ``substantial and credible'' evidence that Clinton may have been ``part of a conspiracy with Monica Lewinsky and others'' to obstruct justice.

Starr, whose report sparked much criticism from Democrats, reported to the House that Clinton may have committed 11 impeachable offenses.

Democratic investigator Abbe Lowell was to follow with his analysis of the evidence.