The constitution leaves qualifications for voting up to the states. If Delaware allows corporations to in certain state elections, it would follow that they’d be able to vote for congressional seats as well.
From article 1:
>The House of Representatives shall be composed of Members chosen every second Year by the People of the several States, and the Electors in each State shall have the Qualifications requisite for Electors of the most numerous Branch of the State Legislature.
Specifically, the 14th amendment's equal protection clause is seen to apply to voting rights (of which apportionment is perhaps the most unclear, but literally giving individuals multiple votes, as opposed to different weights is sort of a beyond obvious violation).
The constitution leaves qualifications for voting up to the states. If Delaware allows corporations to in certain state elections, it would follow that they’d be able to vote for congressional seats as well.
From article 1:
>The House of Representatives shall be composed of Members chosen every second Year by the People of the several States, and the Electors in each State shall have the Qualifications requisite for Electors of the most numerous Branch of the State Legislature.