It would help his case if HE bothered to get his facts correct.
Lincoln would have NO idea what a beanbag was. He never said any such thing.
There were beanbags in Lincoln's time and long before, it's in all the history books!
"Politics ain't beanbag, as Lincoln famously observed."
I don't know if Lincoln said that, but he could have. I think the writer was just making an attempt at humor.
However, we do know that Lincoln said; "Ballots are the rightful and peaceful successors to beanbags" and "A beanbag divided against itself can not stand".
:o)