Republicans in Virginia and a handful of other battleground states are pushing for far-reaching changes to the electoral college in an attempt to counter recent success by Democrats.

In the vast majority of states, the presidential candidate who wins receives all of that state’s electoral votes. The proposed changes would instead apportion electoral votes by congressional district, a setup far more favorable to Republicans. Under such a system in Virginia, for instance, President Obama would have claimed four of the state’s 13 electoral votes in the 2012 election, rather than all of them.

Other states considering similar changes include Michigan, Ohio and Pennsylvania, which share a common dynamic with Virginia: They went for Obama in the past two elections but are controlled by Republicans at the state level.

Republican National Committee Chairman Reince Priebus recently voiced support for the effort, saying it is something that ‘a lot of states that have been consistently blue that are fully controlled red ought to be looking at.