Nationwide, 591 people, about 0.000002 percent of the voting-age population, maxed out their donations to federal candidates in 2012, according to the Center for Responsive Politics.
Justice Antonin Scalia argued that placing any limit on the speech of those people was impermissible.
"I assume that a law that only, only prohibits the speech of 2 percent of the country is OK?" Scalia asked facetiously.
The Republican National Committee is a co-plaintiff against the FEC, arguing that the limits unconstitutionally constrain it from accepting money from people like McCutcheon.
Conrad Lucas, the chair of the West Virginia Republican Party, said he thoroughly supports the RNC's position.
"The court has been very clear that contributions are protected speech and this is simply a reasonable way for individuals to support all the candidates they want to," Lucas said.
He said that a decision striking down the aggregate limits could increase transparency because it would take unreported money that now goes to super PACs and outside groups and send it to party committees and candidates, where it is reported.
Larry Puccio, the chair of the West Virginia Democratic Party, did not explicitly endorse one side in the McCutcheon case, but his basic position was clear.
"From past experience seeing an individual like Don Blankenship literally spending millions and millions of dollars," Puccio said, "we're extremely cautious and fearful that you don't want anybody to spend so much money that they control government."
Secretary of State Natalie Tennant, who is in charge of administering elections in West Virginia, said that getting rid of the aggregate limits could increase the influence of corporations and special interests in West Virginia elections.
"It's my job to protect West Virginians' voices at the polls," Tennant, a Democrat who is also running for U.S. Senate, said in an email statement. "I strongly oppose the corrosive effect of unregulated money in politics. I oppose any attempt to give more power to Wall Street bankers over the voices of regular West Virginia citizens.
Rep. Shelley Moore Capito, who will likely face Tennant in the race to replace Sen. Jay Rockefeller, declined to comment on the McCutcheon case.Reach David Gutman at david.gut...@wvgazette.com or 304-348-5119.