Topeka ? Campaign finance reports show Republican Sen. Pat Roberts raised about $2.2 million in contributions over three months for his Kansas re-election race and ended mid-October with $927,000 in his treasury.

Federal reports available online Tuesday also showed that Roberts relied heavily on contributions from political action committees to fund his campaign. From July 17 through Oct. 15, he raised nearly $1.09 million from PACs.

The three-term Republican incumbent is in a close race with independent candidate Greg Orman.

The challenger is a wealthy Olathe businessman who covered $963,000 of his campaign’s expenses from mid-July through September. A report on Orman’s campaign activities in October was not available online.

Roberts had $1.4 million in cash on hand in mid-July. His campaign spent then spent $2.7 million through Oct. 15.