Amid the usual dry diet of news conferences and forums on education , energy and Medicaid , Gov . Bill Richardson of New Mexico , a Democrat , is speaking to a fund-raising lunch of Iowa trial lawyers ; Gov . Mitt Romney , a Republican of Massachusetts , is meeting with Iowa Republican legislative leaders and appearing with Mr. Pataki at the Republican lunch ; and Gov . Mark Warner , the Virginia Democrat and departing chairman of the National Governors ' Association , is a keynote speaker at a private Democratic Party luncheon .