Malaysia 's opposition leader calls on supporters to attend rally on Wednesday . Abdullah Ibrahim says Sunday 's poll marred by unprecedented fraud . It was won by ruling coalition , ending its 56 years in power . A government spokesperson says allegations of fraud unsubstantiated .
Malaysia 's opposition leader calls on supporters to attend rally on Wednesday . Anwar Ibrahim says Sunday 's poll marred by unprecedented fraud . Election was won by ruling coalition , extending its 56 years in power . A government spokesperson says allegations of fraud unsubstantiated .