The Senate campaign of eye surgeon Rand Paul has topped $2 million in fundraising.

Paul, the son of Texas Rep. Ron Paul (R), narrowly edged his rival for the Republican nomination, Secretary of State Trey Grayson, in campaign receipts as of the end of 2009. Paul had taken in $1.77 million at that point, compared with Grayson’s $1.69 million.

Grayson’s camp passed the $2 million fundraising mark in February, before an event hosted by Senate Minority Leader Mitch McConnell (R)

“Rand Paul’s attempt to break into the family business has benefited from his father’s decades of being a wily political operative,” Grayson campaign manager Nate Hodson said. “Trey is proud to have kept pace with such a seasoned political dynasty and knows that it will take more than donations from his father’s political network to convince Kentuckians that Rand is the right choice for Kentucky.”

Grayson entered the contest as the establishment choice for the Senate seat. Paul has used online “money bombs” to keep pace.