(CNN) — John McCain said Friday he expects the presidential election this fall will increase the occurrence of "spectacular" terror attempts in Iraq.

Speaking at a General Motors facility in Warren, Michigan, the presumptive Republican presidential candidate touted the decrease of violence in Iraq, but said Al Qaeda is not yet defeated there.

"I predict that they will make an attempt as we get in to the election season to make more of these spectacular kinds of attacks which they're still capable of doing," he said. "The suicide bombers, et cetera, would not surprise me and we've already found out that they're going to try and step up their attacks and try and do things in a more spectacular fashion so that they can erode the support of the Maliki government."

John McCain gets aggressive in his new ad, accusing Obama of changing his position on the Iraq for political reasons and ignoring Afghanistan in the Senate. He also released a 17-page booklet attacking Obama's foreign policy, complete with the candidate's once-used, much-mocked seal.

ANNCR: Barack Obama never held a single Senate hearing on Afghanistan.

He hasn't been to Iraq in years.

He voted against funding our troops.

Positions that helped him win his nomination. Now Obama is changing to help himself become president.

John McCain has always supported our troops and the surge that's working.

McCain. Country first.

JOHN MCCAIN: I'm John McCain and I approve this message