Trump held out false hope those jobs would come back (the simple answer)
Hilary wanted to push programs to train those workers for jobs that are actually needed (coal country said fuck that just tell us those jobs are coming back).
Question that nobody asks is how many jobs were lost in coal?
Considering that there is around 50,000 coal jobs in the US, how many could it be? I post the table below so illustrate how few jobs there are, but living in this area and listening to people here, you would think it's millions of jobs lost and coming back. One hell of a snow job on cheeto's part.
Alabama 18,620 3,077 1,135 4,212 4.4
Alaska 1,632 - 125 125 13.1
Arizona 7,603 - 405 405 18.8
Arkansas 59 52 2 54 1.1
Colorado 24,236 1,705 470 2,175 11.1
Illinois 52,147 3,660 504 4,164 12.5
Indiana 39,102 1,986 1,626 3,612 10.8
Kansas 22 - 7 7 3.1
Kentucky 80,380
8,938 3,967 12,905 6.2
Louisiana 2,810 - 280 280 10.0
Maryland 1,925 184 221 405 4.8
Mississippi 3,575 - 309 309 11.6
Missouri 414 - 24 24 17.3
Montana 42,231 333 914 1,247 33.9
New Mexico 21,969 492 794 1,286 17.1
North Dakota 27,639 - 1,242 1,242 22.3
Ohio 25,113 2,063 1,080 3,143 8.0
Oklahoma 1,136 79 125 204 5.6
Pennsylvania 50,870 5,988 2,394 8,382 6.1
Tennessee 1,098 162 135 297 3.7
Texas 42,851 - 2,819 2,819 15.2
Utah 16,977 1,385 52 1,437 11.8
Virginia 16,619 3,428 1,093 4,521 3.7
West Virginia 115,925
15,694 4,587 20,281 5.7
Wyoming 387,924 278 6,395 6,673 58.1
Total 982,877
49,504 30,705 80,209 12.3