Source:
New York TimesMitt Romney is not running for president, yet. But a handful of big donors have each contributed in the realm of $100,000, or more, to Mr. Romney this year through a network of state political action committees he has set up that enable him to avoid federal campaign finance limits.
Through a similar arrangement, the Minnesota governor and a potential 2012 contender, Tim Pawlenty, collected $60,000 in late September from a Texas home builder, Bob J. Perry, one of the Republican Party’s largest donors, and his wife, Doylene, and has taken sizable contributions from a slew of others.
The money, which has gone to the politicians’ “leadership PACs,” is not allowed to be used to fuel a presidential run, but it often acts as seed money to help raise a potential candidate’s national profile and provide financing to other politicians who can help him later. The contributions can also build an infrastructure of staff, offices and donors that can be later transformed into a full-fledged campaign, but this kind of spending also carries the potential of tripping over campaign finance laws.
The outsize contributions are possible because while donations to federal PACs are limited to $5,000, many state-based entities have no such limits. Some can also take donations from corporations and unions, which federal PACs cannot directly do.
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http://www.nytimes.com/2010/11/13/us/politics/13donate.html