When he had to fight off competitors within his own party, Mitt Romney's campaign war chest was dwarfed by Barack Obama's, but now that he's the only Republican candidate, his April intake almost matched the president's.

Romney and the Republican National Committee raised $40.1 million in April, approaching the $43.6 million for the president. That's especially huge compared with the $12.6 million Romney raised in March, when Newt Gingrich and Rick Santorum still fought him for the nomination. And the Romney campaign credits a joint fundraising effort with the Republican party for the nearly four-fold monthly increase, now that the RNC only has one candidate to back, The New York Times' Michael D. Shear reports:

Aides to Mr. Romney noted that the total might have been even higher if the joint fund-raising effort — known as the “Victory” campaign — had begun sooner. The campaign and the R.N.C. announced they were joining forces on April 4 but did not hold the first combined event until April 14, nearly halfway through the month.

Now that it's got all its parts in place (namely, a single candidate to represent the Republicans), the RNC fundraising machine can get to work in high gear, and when it does that, it really does work.