Yes, one definition of Aphorism is "a statement of principle" making "drill baby drill" used in the 2008 Republican Campaign an aphorism. An aphorism is an original thought, spoken or written in a laconic (concise) and memorable form. (Wiki)
"Drill baby drill" is an oil field term stating the order of business in the oil industry, "drill first then ask questions later" is a good parallel expressing the 'Manifest Destiny" that oil companies lobby in Washington.
It is easy then to see how it became a slogan during the 2008 Republican Campaign.
Aphorism is the way of expressing general truth. This is an example sentence using aphorism.
The woman's favorite aphorism was "Life is short,".
A sentence using aphorism: My favorite aphorism is "It's a small world." Something that is short and says something true...
An aphorism is a short original phrase that states a truth. The purpose of an aphorism is to concisely state something, and is sometimes intended to be amusing.
In the words of the infamous Sarah Palin "Drill, baby, drill"! -EJS
The U.S.A Baby
"It proves the old aphorism that if something looks too good to be true then it probably is."
aphorism
Example : "Too many cooks spoil the broth" is a well-known aphorism. Example : It proves the old aphorism that if something looks too good to be true then it probably is."
an aphorism is a terse saying embodying a general truth, or astute observation
An aphorism is a short pithy comment, no more than a sentence long.
aphorismatic