Denver Mayor and gubernatorial candidate John Hickenlooper announced Monday that his campaign had spent $850,000 to reserve TV advertising time this fall.
Hickenlooper, a Democrat, announced that he had raised about $380,000 during the month of May, in addition to his previously announced total of $1.1. Million.
The campaign said it also spent about $123,000 on a direct mail campaign, leaving it with about $130,000 cash on hand.
Hickenlooper entered the race in January.
Financial reports for gubernatorial campaigns are due to the Secretary of State on Wednesday, June 2.
Hickenlooper's opponent, Scott McInnis, had about $490,000 on hand through the end of April, and has not yet made an announcement regarding May fundraising.
The Republican Governor's Association has spent upwards of $500,000 on a negative ad campaign tying Hickenlooper to outgoing Governor Bill Ritter.