Or we could write an article on how immigration divides the Democrats into three camps: those who want amnesty in return for some future nebulous promises of border control, those who just want amnesty now with no promises, and those who want to actively encourage immigration from every third world hell hole in the world in order to displace the native population.
A more apt comparison for Democrats would be the issue of gun control with a small but growing number who oppose gun control laws, a hard-core faction that continues to support increased gun control, and a sizable group in between that seems to wish the issue would disappear.
Abortion is a trickier issue for both parties. Poll after poll shows that a majority of Americans support legal abortion while at the same time supporting limits to legal abortion. Both sides use these polls as evidence that they're winning. The Democrats position of "anytime, anywhere, anyplace for any reason" on abortion is as much a political loser as the opposing position of supporting a "no exceptions" prohibition on abortion is.