You get twice the voting power by voting for Grimes a non vote or third party vote only counts once.
No, thank you. No one could not pay me to vote for Grimes.
I detest the liberal republican though I would not vote for a liberal democrat who will walk in line as Hillary does for Her Party!
To vote for someone is to give assent to his/her views and stated policies. To vote for Grimes is to be no better than the progressives and socialists who will vote for Grimes.
If you want to stand with someone who is not on the ballot, write in the name of the person. If you cannot stand with anyone, or if the election laws do not allow write-ins, withhold your vote. But don't vote for an enemy of American founding principles, simply because you find the other option undesirable.