Correction: An earlier version of this story omitted several eligible write-in candidates; WCPO regrets this error.
Turns out, that's pretty much as effective as voting for Mickey Mouse.
Don't get us wrong: We understand Portman's trying to make a symbolic statement. It's just that writing in Pence -- Indiana's conservative governor and Trump's running mate -- won't count.
The same goes for writing in anybody else who failed to file as a write-in candidate by Ohio's deadline 72 days before the election (we'll spare you the math, it was Aug. 29 this year).
Ohio's only write-in presidential candidates for the Nov. 8 general election are listed here.
If you write-in anyone else, your vote for president and vice president doesn't count.
It's also too late for anyone to file as a write-in candidates in Indiana if they haven't already.
In Kentucky, write-in candidates have until the end of this month to file.