Final answer:
The Obama administration promoted charter schools through the American Recovery and Reinvestment Act, which included the Race to the Top program requiring states to lift caps on charter schools to receive grants.
Step-by-step explanation:
The Obama administration's initiative to support charter schools was part of its first major legislative effort, the American Recovery and Reinvestment Act, often referred to as the stimulus bill. This act included a significant education component with the creation of the Race to the Top program, which made available $4.3 billion in competitive grants to state education systems. To be eligible for these grants, states were required to lift caps on the number of charter schools that could be established annually.