Did Melania Trump plagiarize from Michelle Obama?

Melania Trump, wife of Republican US presidential candidate Donald Trump, spoke at the Republican National Convention in Cleveland, Ohio, US July 18, 2016. Her speech went viral on social media because it appeared to have been plagiarised. A section of the speech describing the values that shaped her life strongly resembled a passage from Michelle Obama’s speech to the 2008 Democratic convention.
Jani Sena: “Stealing Echoe’s words: Exactly what is funnier than a bunch of racist republicans unwittingly applauding Michelle Obama’s words? Not a damn thing.”
Vicente Cañaveras Lasprilla : “Copied speech spoken by an immigrant, who happens to be the wife of a politician who wants to build a wall to keep immigrants out.. okay.”