The correct answer is D. Neither the Democrats nor the Republicans have a good plan.
Explanation
The author of the text exposes a specific political situation and focuses on highlighting that it is not necessary to belong to a specific political party to make political mistakes by saying "The good news is that Congress failed last week to reach an agreement on two bad more ideas: the wrong push by the Republicans for offshore drilling and the wrong plan by the Democrats to curb speculation about our future." This allows us to infer that the author does not support any of the political parties. In addition, he expresses that the ideas that each party proposes are not good when saying "Putting them together is combining a bad idea with another". According to the above, the correct answer is D.