We can all debate the reasons why it has chosen political suicide. Some argue that the Republican Establishment's big business benefactors are paying them to push immigration reform so that by importing cheaper labor, big business can undercut the American worker by hiring immigrants at a lower wage, allowing for larger profits. Others argue that the Republican Establishment is pandering to Hispanic voters hoping to be able to purchase their loyalty and thus have a reliable block of voters that can compete with democrat's lock on the African American vote. Both arguments are most likely true.
I suggest a third argument. The Republican Establishment has now concluded that its conservative base is beyond being able to be reconciled with. It is desperate to find replacements to make up for the number of conservative and libertarian-leaning voters leaving the Republican party in droves. Since the Tea Party movement's inception, the Republican Establishment has feared it from gaining a foothold in Washington D.C.. This has led to the Republican Establishment acting like angry territorial squirrels, wagging their tails and chattering in skittish rage because someone may ask them to share their horde of taxpayer acorns. Add to this its paranoia that someone may not only find out how they have come to amass such a huge taxpayer acorn stash, but they may also find acorns they have secreted away in other parts of the woods while no one was looking.
Elected members of Congress and the Senate, supported by the Tea Party movement and its conservative base, have been targets of these paranoid blue-blood squirrels since they were elected. We now see the Republican Establishment has
changed its primary schedule hoping to be able to give their preferred candidates an advantage by shorting the time a grassroots candidate has to fund raise and gain momentum. All of this has further alienated its conservative base. One has to conclude that considering all that has happened in the last few years the Republican Establishment has calculated that to be able to remain a viable force in Washington D.C. it desperately needs the Hispanic vote now; without it, their fiefdom in D.C. Is doomed.
All these reasons are possible. It's the outcome that is certain if the Republican Establishment continues with its plan on immigration reform. Once it proposes any immigration reform that does not fully secure the border first, demand that current laws be executed as designed without condition, gives no protection or preference to immigrants already here illegally, and do all this in a solid no-loophole weasel-proof way it will have officially passed the event horizon into the black hole of obscurity.