Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: NEW YORK (CNNMoney.com) -- U.S. President Barack Obama set his green plan into action Monday, potentially reversing several Bush-era decisions on global warming and fuel efficiency. U.S. President Barack Obama signs orders Monday on vehicle emissions and fuel efficiency standards. In his first major environmental acts as president, Obama directed his Environmental Protection Agency to review a California application to regulate greenhouse gases and told his Department of Transportation to begin implementing fuel efficiency standards passed last year but not implemented by the Bush administration. He also pushed for passage of the $825 billion economic stimulus package in the House and Senate. Those bills include money for investments in renewable energy, conservation and a better electric grid.Obama orders review of California request to regulate greenhouse gasesU.S. president orders government to implement fuel efficiency standardsAutomakers oppose plan as an expensive patchwork of lawsFormer President George W. Bush stopped earlier attempt for state standards 
 Question:The new standards, originally supported by _, were put on hold during his last days in office, in response to the woes facing the auto industry.

Bush