CISPA proponents argue that legal immunity was necessary to encourage companies to freely share data. The bill's main sponsors, Reps. Mike Rogers (R-Mich) and Dutch Ruppersberger (D-Md) have noted that technology companies, or "those in the business of prosperity on the Internet," support the bill. Supporters include IBM, Intel and AT&T.
In fact, nearly 200 senior IBM executives flew to Washington, DC earlier this month to press for CISPA's passage. Immediately after the IBM visit, the number of CISPA's cosponsors jumped from two (Rogers and Ruppersberger) to 36, Donny Shaw, a political writer with MapLight, wrote on the group's site.
"New co-sponsors have received 38 times as much money ($7,626,081) from interests supporting CISPA than from interests opposing ($200,362)," Shaw wrote.