In 2005, the Democratic National Committee's Commission on Presidential Nomination Timing and Scheduling ranked it ninth on a list of ten priorities, just above keeping the status quo.
The size of the initial regional primary may be large enough to prevent less-funded candidates from being able to compete.
Larry Sabato, Director of the University of Virginia Center for Politics, proposed a lottery system in his book A More Perfect Constitution.
Given the stability of the voting patterns over the last several elections, regions might be balanced politically, at the possible cost of some contiguity.
For example, instead of including Pennsylvania, Maryland and New Jersey in with New York and New England, a balanced region might bounce over to Ohio, Indiana, and Kentucky instead.