Today, the District of Columbia has more residents than at least two other states; Puerto Rico has more than 20. With numbers like that, admitting either or both to the union is less a political power play on the Democrats' part than the late-19th-century partisan move that still warps American politics.
Only a few years after building a federal system that cleared the way for equal opportunity, Republicans faced a racist and xenophobic backlash against an active government - and they folded. By the 1880s, the party's leaders had abandoned their message of opportunity and tied themselves to big business.
At the turn of the last century, extremists were forced back to the political fringes while younger politicians resurrected the vitality of the original Republican vision. They recognized that the nation could only develop and grow by protecting equality of opportunity for hardworking Americans at the bottom of the economic ladder.
The rise of a new kind of political science in the 1960s has been driving a wedge between political insiders and voters ever since. By turning voters into interest groups, it stopped establishment leaders from articulating a national narrative. It opened the way for Movement Conservatives to create today's political crisis.
Since 1981, when President Ronald Reagan took office promising to scale back the federal government, Republican leaders have promised to cut regulation and taxes, and to return power to individuals to arrange their lives as they see fit. But they have never entirely managed to eradicate the New Deal government.