Mitt Romney’s presidential campaign announced Wednesday that it received $18.3 million in contributions in the second quarter, by far the most raised by any of the Republican candidates during the three-month fundraising period that ended June 30.

The former Massachusetts governor also reported cash on hand of $12.6 million, and a “burn rate” of 31 percent off of donations received from contributors in all 50 states and Washington, D.C. Romney’s take presumably included more than $10 million raised in a single day in May during an all-day phone bank held in Las Vegas.