Napoleonrules
Banned
Perhaps Bernie, Hillary, Obama, etc aren't saying they're fine with undocumented workers wandering in, etc, but if you reduce efforts to stop them from coming, don't deport them when you happen to catch them, and do everything you can to make them feel welcome (benefits, no police, even calling them by a nice term, etc.), you're essentially saying you're fine with them coming.
Environment comes down, in part, to the convergence of rising environmentalism, woodstock, and the sexual revolution.
On labor, the Democratic party is certainly as strongly pro-labor as ever, but labor (as a portion of Democratic party power) has declined. Hillary, Bernie, etc are all solidly pro-labor, no right-to-work, spend and spend, etc and all heavily backed by unions, especially the government ones.
Let's get a couple things straight- Compared to today's Republicans and even the average Republican at the time, Eisenhower and Nixon were both very liberal. Eisenhower and Nixon both had high taxes and didn't campaign on lowering taxes, that all came about in the Conservative Reagan revolution. Nixon created the EPA and lots of other bureaucracy. Eisenshower created the interstate highway system and the federal control over it. Both not only continued the bureaucracy and welfare system of FDR, JFK, and Johnson but also acknowledged its right to exist. And as far as universal healthcare? Yea both Eisenhower and Nixon wanted it. In fact every president from FDR through Carter wanted it. Everything you think of as Republican today- is from Reagan. Except for expenses must match revenue (and talk was about cutting the expenses, not cutting revenue as well), that's old school Republican, last espoused by Rockefeller. You can't compare pre-1980 elections of Republican versus Democrat to today's in terms of liberal and conservative.