US President Donald Trump has spent years attacking his predecessor Barack Obama for what he called a giveaway to Iran. The image of "pallets of cash" became one of his favorite political talking points, a symbol of what he portrayed as weakness in dealing with Tehran.
Yet the irony of the current moment is becoming harder to ignore. As negotiations to end the latest US-Iran confrontation stall, Iran is demanding access to billions of dollars in frozen assets, and the success of any deal may depend on whether Trump agrees to some form of financial relief. The president who built his Iran policy around rejecting Obama's approach may now find himself confronting the same reality that faced previous administrations -- diplomacy with Iran often comes with a price tag.