The Romney campaign's down-to-the-wire fundraising on May 31 inspired a surge of contributions from individual small donors, making June 1st the best fundraising day of the month. After this aggressive start — Romney raised nearly $1.7 million on that one day — contributions rose and fell throughout the rest of June. They then spiked again to just over $1.5 million after the June 28 decision on the Affordable Care Act.
Obama's campaign struggled in the early days of June, failing to break the $500,000 mark most days. However, beginning on June 26, two days before the health care decision, donations rose to over $1.5 million. Obama for America closed out the month by raising just below $2.4 million on June 30.