To a point. The progressives have chipped away at the Constitution and other protections to allow "mob on demand" flows to override things. The poison Mr. Jefferson mistakenly introduced into the "party of the people" may kill slowly, but it kills nonetheless.
What poison are you referring to ?
Are you calling Jefferson a progressive, or ultimately responsible for progressivism? No. Or is it just that the Democrat Party was founded by Jeffersonians? No again. It dates from Jackson, technically (and actually was formed by Jackson’s little helper, Van Buren). Jeffersonians are different enough from Jacksonians, let alone today’s Democrats. Hell, today’s Democrats don’t even resemble New Deal Democrats.
It has always irked me that just because the parties have kept the same names since Jackson and Lincoln respectively we must pretend as if they’re the same parties. Lincolnians might as well have been Whigs, for all the difference it makes to contemporary Pubs. We have fun rubbing the KKK in Dems’ faces, but is there any essential connection between fictitious Confederate ghosts and today’s Dems? Hell no. They’d be union men, not secessionists. Unless it was the central government who owned slaves instead of private individuals, and instead of seceding they were kicking out the red states so as to have no more tubes in the way of socialization.