Nigerian lawmakers passed a second vote of confidence on Mr. Tambuwal amid allegations of corruption. A multibillion naira car scandal involving 400 Toyota Camrys purchased for House of Representatives members, is stirring concerns against Speaker Aminu Tambuwal.Nigerian lawmakers passed a second vote of confidence on Mr. Tambuwal amid allegations of corruption. A multibillion naira car scandal involving 400 Toyota Camrys purchased for House of Representatives members, is stirring concerns against Speaker Aminu Tambuwal.