McCain Ad Buys Drop In OH, PA, IA, NM

John McCain's ad buys have dropped dramatically over the last few weeks, including his investment on the airwaves in critical battleground states: OH, PA, NM and IA.

According to information provided to On Call by a reliable Democratic media buyer, McCain is spending $611K on television spots across the nation for the week of 8/5-8/11. Just three weeks ago, from 7/15-7/21, the GOPer dedicated $4M to ad buys.

Also notable is the campaign's decrease in spending over the last week in four battleground states:

-- In OH, McCain's campaign spent $197,018 for the week of 7/29-8/4. From 8/5-8/11, the Republican is spending $108,450.

-- In PA, McCain's campaign spent $92,808 for the week of 7/29-8/4. From 8/5-8/11, the Republican is spending $50,134.

-- In IA, McCain's campaign spent $45,844 for the week of 7/29-8/4. From 8/5-8/11, the Republican is spending $10,543.

-- In NM, McCain's campaign spent $25K for the week of 7/29-8/4. From 8/5-8/11, the Republican is spending nothing.

Read on for details of next week's ad buys.