the answer is "SPLIT"
bi-partisan
voting a split ticket
A split-ticket refers to a ballot on which the voter has chosen candidates from different political parties when multiple offices are being decided by a single election. Split-ticket voting is in contrast to straight-ticket voting in which a voter chooses candidates from the same political party for every office on the ballot.
Because they vote for candidates of different parties for different offices at the same election.
You are voting split-ticket. People who vote split-ticket make it point to vote for at least one Republican and at least one Democrat.
A split-ticket refers to a ballot on which the voter has chosen candidates from different political parties when multiple offices are being decided by a single election. Split-ticket voting is in contrast to straight-ticket voting in which a voter chooses candidates from the same political party for every office on the ballot.
Split ticket voting is the current ticket system; where all candidates are shown on a ballot. Unlike in the "old" days when you would receive a ticket with the candidate of the party you affiliated with.
Split-ticket
Independent voters are most likely to engage in ticket splitting, as they are not bound to a specific party and may choose individual candidates based on their policies and qualifications rather than party affiliation. Ticket splitting allows independents to vote for candidates from different parties in different races.
The most obvious result of ticket splitting is the election of candidates from different parties to different offices. This allows voters to select candidates they believe are best suited for each position, rather than sticking to one party across the board. Ticket splitting can help promote diverse representation in government and encourage candidates to appeal to a broader range of voters.
I presume you mean someone who is excessively loyal to his a party. Such a person would obviously vote for all his parties candidates and positions, that is vote a straight-party ticket.
Voting for candidates from more than one party is called split-ticket voting.