Lt. Gov. Lee Fisher (D) has ramped up his spending ahead of a May 4 Senate primary against Secretary of State Jennifer Brunner.

Fisher’s campaign reports spending $975,000 during the first two weeks of April, of which $900,000 went to the Chicago media firm AKPD Message and Media for television ads. The buy began April 13 and will end on primary day.

Fisher raised $53,000 during the first two weeks of April and had $907,000 left in his campaign account on April 14.

Brunner’s campaign raised $33,000, spent $53,000 and had $59,000 left to spend as of April 14.

Her light fundraising is one reason the Democratic Senatorial Campaign Committee prefers Fisher.

Either Fisher or Brunner will go on to face former Rep. Rob Portman, who is unopposed in the GOP primary.

Portman raised $214,000 during the first two weeks of April — more than four times what Fisher raised — and had $7.7 million on April 14, more than eight times what Fisher banked.