Ms. Warren’s haul — $24.5 million so far — has already catapulted her to No. 15 on the list of most successful Senate money-raisers in history, according to an analysis by the Center for Responsive Politics done for The New York Times. With more than three months to go before Election Day, she is likely to climb higher. …

Ms. Warren’s Republican opponent, Senator Scott P. Brown, has raised $19.9 million. Their combined tallies of more than $44 million could make the Massachusetts contest the most expensive Senate race in the country this year.

The pace of Ms. Warren’s fund-raising has only accelerated. In the second quarter of this year, she raised $8.67 million, her most successful quarter so far; she raised $3.1 million in June alone. Mr. Brown raised $4.97 million in the quarter. If Ms. Warren is picked to deliver the prime time keynote speech at the Democratic National Convention in Charlotte this summer, as has been whispered lately, she could reach many more potential donors.