For 2010, Sen. Cochran is responsible for 240 earmark projects at a cost of $490 million. In the past three years, Cochran is responsible for more than $2 billion in earmarks. Most of it was for his home state but also included $200,000 for the National Opera in Washington, D.C.
ABC News tried to get a reaction from Sen. Cochran to the Pig Book, but his spokesman Chris Gallegos said that the senator "has chosen not to comment on this story."
Among other top spenders in the Senate: Sen. Arlen Specter, D-Pa., requested $26.5 million in funding for 85 labor, health and human services, and education projects; Sen. Sam Brownback, R-Kan. -- along with fellow Republican congressmen from Kansas, Pat Roberts and Todd Tiahrt -- asked for $3.5 million for the National Institute for Aviation Research; Senate Appropriator Mary Landrieu earmarked $1 million for the tourist spot Sewall-Belmont House in Washington, D.C.; Sen. Tom Harkin, D-Iowa, earmarked $7.3 million to continue the grant program named after him; and Sen. Robert Byrd, D-W.Va., requested $7 million for the Robert C. Byrd Institute of Advanced Flexible Manufacturing Systems.
In the House, Rep. Earl Pomeroy, D-N.D., set the record for the highest dollar amount of earmarks -- a staggering $148.4 million.
Hawaii led the way in states with the most pork per capita, followed by North Dakota and West Virginia.
A White House analysis released Monday showed similar results. It found that members of Congress obtained a total of 2,000 fewer pet projects for their states and districts, resulting in a 17 percent drop in the number of earmarks and a 27 percent cost reduction.
"All too often, earmarks are an easy vehicle for special interest dealmaking -- inserted into congressional spending bills without filter for merit, need, priority, or any scrutiny," White House budget chief Peter Orszag said in a statement. "Although more needs to be done, the news is encouraging: Earmarks are down by double-digit percentages."
Although earmark spending is down, virtually every other category of federal spending is way up. Indeed, earmark spending represents less than one-fifth of one percent of federal spending.
ABC News' Huma Khan and Z. Byron Wolf contributed to this report.