Penetrating Hillary.

I believe Walker's people realize that combining "Hillary" in any context with a possibly sexualized word such as 'penetrate' causes many to reflexively recoil at the thought, and, by extension, at Hillary.

Other phrases that they may have tested:

'prick Hillary's conscience'

'ream Hillary's law career'

'fingering Hillary's body of work'

'attacking Hillary's truth through the back door'

'felching on Hillary's promises'

and

'gang-banging Hillary's inner circle'

I am Laslo.

http://althouse.blogspot.com/2015/02/the-narrative-is-we-have-chance-to.html