Go ahead and continue to laugh Trump off libtards. We will see who gets the last laugh.
Trump clinched the nomination due to several convenient overlapping factors: delegate rules that gave him delegates disproportionately relative to his popular vote, a fractured field that also gave him more delegates, his opponents refraining from defining him until it was too late, and a cast of candidates that were just utterly terrible.
Not to mention, the type of support Trump attracts, especially the racists and misogynists, weren't exactly coming out in droves for Democrats anyway.