That Depends On What The Definition Of "Is" Is
Gee... where have we heard this before?

This reminds me how Uncle Joe Stalin simply made people "disappear" from all historical records.

Here's some of the article from CQ Politics; (Emphasis mine)
Congress to Erase Obama’s Name From Earmark

Congress will scrub President Obama’s name from a list of earmark cosponsors in the $410 billion omnibus spending bill. The reason: Whether Obama cosponsored the earmark depends on what the definition of earmark is and when an earmark becomes an earmark, according to the Senate Appropriations Committee.

The provision itself is still considered an earmark, and it’s staying in the bill (HR 1105) — but it’s losing the Obama brand.

As of Thursday, Obama’s name appeared along with three dozen other senators as a cosponsor of a $7.7 million line item for vocational training at two schools run by American Indian groups in New Mexico and North Dakota.

The White House objected to the characterization of the provision as an earmark — a sensitive topic, given that Obama said he didn’t request any earmarks in 2008.

Subsequently, Senate Appropriations Committee spokesman Rob Blumenthal said Obama’s name would be removed from future versions of the congressional report identifying earmarks and their sponsors. Other senators listed with him as cosponsors will be judged on a case-by-case basis.