Businessman Bill Binnie is continuing to dip into his personal fortune to help finance his New Hampshire Senate bid, although national Republicans continue to support his primary opponent, Kelly Ayotte, in the race to replace retiring Sen. Judd Gregg (R).

With the Sept. 14 Republican primary looming, Binnie loaned his campaign $500,000 on Sept. 3, according to paperwork filed Tuesday with the Federal Election Commission. That brings his self-financing total to more than $5.75 million, which represents the vast majority of his campaign fundraising to date.

“This will give us the ability to get our message to the people. We are committed to winning,” campaign spokesman Gerry Nicholls said.

The campaign is already running statewide television ads. Asked whether Binnie would increase his media presence in the days before the primary, Nicholls said, “Stay tuned.”

Binnie had spent three times more than Ayotte as of Aug. 25, according to their pre-primary filings. Ayotte is a former state attorney general and was recruited to run by national GOP leaders.

Both Ayotte and Binnie led Democratic Rep. Paul Hodes in a head-to-head test of the November matchup in an Aug. 5 Rasmussen Reports survey, although Ayotte’s lead was 13 points while Binnie led by 6 points.

The Republican primary is crowded, however, and also includes businessmen Jim Bender and Ovide Lamontagne.