The Governor shall provide each presidential elector with a list of all the electors. If any elector is absent or if there is a deficiency in the proper number of electors, those present shall elect from the citizens of the state so many persons as will supply the deficiency and immediately issue a certificate of election, signed by those present or a majority of them, to the person or persons so chosen. In case of failure to elect by 3 p.m. of such day, the Governor shall fill the vacancies by appointment. After all vacancies are filled, the college of electors shall proceed with the election of a President of the United States and a Vice President of the United States and certify their votes in conformity with the Constitution and laws of the United States. Each at-large presidential elector shall cast his or her ballot for the presidential and vice-presidential candidates who received the highest number of votes in the state. Each congressional district presidential elector shall cast his or her ballot for the presidential and vice-presidential candidates who received the highest number of votes in his or her congressional district.