House Minority Whip Steny Hoyer hypothesized Tuesday that Republicans won’t have enough votes to pass a controversial education reform measure that’s intended to replace No Child Left Behind.

The bill, dubbed by Republicans as the “Student Success Act,” could come up for a vote by the end of the week. The measure turns billions in education funding into block grants for states to decide how to spend. States can also set up their own accountability systems and the bill would repeal other federal education acts like President Obama’s Race to the Top.