Despite the downturn in support for his Democratic opponent, Ohio Republican Sen. Rob Portman is not letting up on his ad blitz in his race for re-election.

In his latest ad, which will run statewide, Portman features the father of Staff Sgt. Matthew Maupin, who was captured and killed in Iraq.

Maupin’s father says Portman “cares about the troops.” In May, Portman’s campaign said it would reserve $15 million in advertising through Election Day.

And earlier this month, Portman’s campaign spent $250,000 for an ad showcasing the senator speaking Spanish, which he speaks fluently.

Portman’s ad burst comes despite the fact that both Senate Majority PAC, which supports Democratic candidates, and the Democratic Senatorial Campaign Committee have delayed ad buys for his opponent, former Ohio Gov. Ted Strickland.

The race was close over the summer but most polls now have Portman up by double digits. The latest RealClearPolitics average of recent surveys has the Republican ahead by 13.1 points.

Recently, The Rothenberg & Gonzales Political Report/Roll Call changed its race rating from Tilts Republican to Leans Republican.