What major initiative did George W. Bush Jr. advocate as part of his conservative agenda?

George W. Bush Jr.'s major initiative that aligns with his conservative agenda is tax cuts and education reforms. Upon taking office, Bush emphasized the need to stimulate the economy through tax reductions, advocating for significant tax cuts aimed at individuals and businesses as a means to encourage spending and investment. This was part of his broader economic policy known as "compassionate conservatism."

Additionally, education reform was a significant aspect of his presidency, most notably through the implementation of the No Child Left Behind Act. This initiative sought to increase accountability in education by setting standards and measuring outcomes, reflecting his push for educational improvement. The combination of tax cuts and education reforms exemplified his administration's conservative approach by advocating for less government involvement in the economy paired with an emphasis on accountability in public services.

In contrast, increased regulations and healthcare expansions represent more liberal or progressive initiatives, which were not central to Bush's conservative policies. Military spending increases, while a focus during his presidency especially in the context of the War on Terror, do not encompass the major domestic initiatives that defined his domestic conservative agenda as much as tax cuts and educational reforms did.