Backed by Israel, it's the only foreign policy issue that unites the GOPBy Trita Parsi
The rise of the Arab masses has pushed Iran out of the headlines -- for now. Even Mahmoud Ahmadinejad, whose theatrics rarely pass unnoticed, has lately failed to grab the attention of the U.S. media. America's attention has instead turned toward Egypt, Syria and Libya.
This is likely to change in the next few months. Not as a result of any particular developments in Iran or between the United States and Iran, but because of the 2012 presidential elections. As the Republican presidential hopefuls turn their criticism toward President Obama and not each other, Iran will likely be one of the few foreign policy issues the Republicans will pursue.
--CLIP
First, Iran unites all factions of the Republican Party (save the Ron Paul contingent) at a time when all other major foreign policy issues tend to divide them. For instance, the Republicans have been all over the map on the most important foreign policy development of the year: the Arab Spring.
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http://www.salon.com/news/politics/war_room/2011/09/18/gop_iran