Republican presidential candidate Jeb Bush has proved once more to be a fundraising machine after raising more than $500,000 during a 24-hour trip to New Jersey.

The former Florida governor has not only earned an endorsement from New Jersey Gov. Chris Christie's close friend, state Sen. Joe Kyrillos, but is rapidly courting donors in Christie's backyard.

A Bush campaign aide first confirmed to the New York Times that the Florida Republican raised a combined sum of more than half a million dollars during his two campaign events in New Jersey on Thursday. The impressive haul falls in line with the unrivaled $114.4 million raised by Bush's campaign committee and outside support groups so far this year.

According to Bush's campaign filings with the Federal Election Commission, a number of his largest donors — individuals who contributed the maximum amount of $2,700 permitted by FEC rules — hailed from New Jersey.

Using a computer analysis of data from the FEC and New Jersey Election Law Enforcement Commission, NJ Advance Media group found that 14 individuals who contributed to Bush's presidential campaign committee had previously donated to Christie's gubernatorial committee. The sum of those contributions totaled $35,500, according to the local media group.

Bush's fundraising success has translated in the early Republican primary polls as well. The former governor has maintained a steady position near the top and took the lead in the latest Quinnipiac poll over Democratic front-runner Hillary Clinton in a number of key battleground states.

Both Bush and Christie were among candidates that one in four Republican activists indicated they would never vote for and would be upset to see nominated, according to a recent survey of Republican voters by the Huffington Post and YouGov.