The run-up to the Presidential primaries involves a lot of fund-raising for US Presidential candidates. They do not want to leave any stone unturned, as money could be under one.
The Internet has been an area of interest from politicians ever since Howard Dean received millions in contributions through a largely grass-roots, online effort. Though he did not make it out of the primaries, Dean influenced the current crop of candidates for the White House.
Measurement firm Compete said in its assessment of who's receiving the most attention that the web has become an indispensable tool for the candidates to solicit funds and build their networks of support. Those candidates have received various levels of attention.
Republican candidate Romney has easily outpaced John McCain and Rudy Giuliani in the daily attention metric measured by Compete. "The spike in mid May coincides with his (Romney's) 'Sign Up America' drive that reportedly netted over 30,000 new supporters in 24 hours," Compete's Matt Pace wrote.