The term “exempt function” means the function of influencing or attempting to influence the selection, nomination, election, or appointment of any individual to any Federal, State, or local public office or office in a political organization, or the election of Presidential or Vice-Presidential electors, whether or not such individual or electors are selected, nominated, elected, or appointed. Such term includes the making of expenditures relating to an office described in the preceding sentence which, if incurred by the individual, would be allowable as a deduction under section
162
(a).