A top economic adviser to President Barack Obama says the president is pushing for a balanced approach to reviving the economy - using both new spending and tax cuts.Republicans say the $825 billion recovery package working its way through Congress relies too much on government spending - and not enough on tax relief for families and businesses.Top Obama adviser Lawrence Summers says some Democrats wanted the package tilted even more toward spending, but that the president sought middle ground.Democratic Leaders hope to approve the package by mid-February.