The Democrats are to blame. Starting with Clinton being weak, giving them $4 billion for coal burning electric plants with the agreement that NK wouldn't pursue nuclear interests.
But that didn't happen. NK detonated its first nuke in '06. And what did Obama do? Cuts missile defense funding. Makes "stern warnings, aka empty threats, “strategic patience,” and literally nothing. Like "red lines" in the sand. So thanks to the liberal Democrats we are where we are.
And you want to see some biased bullshit, do a google search on "obama north korea threat". Most of the hits have Trump in the title and not Obama. Clinton is the other way around.