Every week, Washington Wire provides a rundown of the top online political ads, based on data from Visible Measures.

Two high-voltage attack ads faced off in the most recent week, with the Obama campaign’s aggressively negative “Firms” spot taking the top ranking with over 1.4 million views, besting “These Hands” from the Romney campaign.

The rankings are based on data from Visible Measures for the week ended Sunday.

The Obama spot uses footage of Mitt Romney singing “God Bless America” while running through footage of various places, including the Cayman Islands and Switzerland. As the Journal’s Peter Nicholas wrote a week ago, the ad suggests Mr. Romney is a hypocrite for proclaiming his love of country while parking his money overseas.