It’s probable that portions of Melania Trump’s speech at the Republican National Convention were lightly rephrased versions of passages from a Michele Obama speech. If this was done by a speech writer, Melania is not really guilty of anything. If it was done by Melania, it suggests that maybe her view of the Obamas is more favorable than that of her husband, i.e., if she drew from the speech so much, she must have really liked it on some level. In either case, Hillary would be advised to cut her some slack by, say, issuing a statement that she doesn’t doubt that the speech expresses the sincerity of Melania’s belief in her husband.
The key point has already been made–that this incident is yet more evidence that the Republicans and the Trump campaign are in disarray. To keep the issue alive serves no useful purpose. I say this not because I have a fondness for models (even a model from a former non-Stalinist Slovenian communist family), but because it’s the smart thing to do–it helps to show that Hillary’s the adult in the race who wants to keep things focussed on what matters.