Makes absolutely no sense?
Makes plenty of sense. If you look at the polling, the #1 issue for about 20% of the Democrats is unemployment/economy. Not welfare, not typical uber-lib policies. These are the blue-collar Reagan democrats who still exist.
Trump can absolutely attract them.
Trump, by hitting on the number 1 Conservative message in an effective way, has reached most Conservatives. That is he puts the continuity of American achievement, the continuity of having a recognizable America and her interests, first. This reaches not only most true Conservatives, but a great swath of other Americans who do at least love America & her interests, even if they fall for the Leftists appeals on particular other issues.