WASHINGTON (AP) — Mitt Romney's presidential campaign has raised at least $100 million in August, The Associated Press has learned, hitting that mark for a third consecutive month with a fundraising prowess that has let him outraise President Barack Obama so far this summer.

The early numbers, which include money raised by the national Republican Party, will be publicly released next week. They were described by two people familiar with the figures who spoke on condition of anonymity because they were not authorized to share internal campaign matters.

The numbers were revealed on the first day of the Democratic National Convention in Charlotte, N.C., where delegates will nominate Obama for a second term. Federal records show that Romney and the GOP have pulled in more cash than Obama's re-election effort in May, June and July, including money collected by the Democratic Party.