This thread displays some serious political immaturity.
Party dominance is cyclical. Thats about as firm a rule as there is in American politics. Remember when everyone was writing autopsies for Republicans after Obama's victory, and correspondingly Democrats held complete dominance of congress? Republicans flirted with modernizing and becoming Democratic-lite, but they ended up veering harder right to much success.
Furthermore, issues of importance in voter's minds reliably strengthen and weaken EVERY election cycle. There's years the economy ranks as the number one issue, and there's years it struggles to crack the top five. There's a good chance no one will care about immigration in 2020.
To this point, in 2003/04 Bush won by riding the Iraq war. In 2007 support for the war was so toxic even Fox News warhawks were distancing themselves from it. Hilary Clinton's support for the war derailed her presidential hopes in 2008, and its safe to say her political career was never the same. This highlights the danger in caping for another party, and trying to appeal to their base at the expense of your party's convictions and values.
If I told you in 2006 that a black man would be the next president, you'd have me committed to a nuthouse. If I told you in 2014 that Trump would succeed Obama as the next president, you'd have me recommitted. American politics are volatile, and hardly static and fixed.
Trump will give the democrats plenty to exploit in the midterms and upcoming presidential. And the world will be much different in a couple of years. Dems will succeed thru forward thinking, and asking the basic question if voters are better off with Trump as president, and not this backwards idea that they need to follow republicans lead and act more hawkish about immigration. That would be so awkward and transparent.
Ruminating about election cycles isn't gonna help you on current elections and those cycles are caused by shifting voting patterns and by parties shifting positions
There was a time when republicans was the party of civil rights and the democrats the party of the kkk
So democrats shifting in immigration wouldn't be anymore awkward than the multiple shifts on issues by both parties in the past 100 years
For the record I predicted in 2007 that Obama would win and I predicted in 2014 that Hillary would lose and I predict now that if the democratic presidential candidate has a similar position on immigration to Hillary he or she will lose and any democrat that takes a hawkish stand on immigration will win