No one is saying she did.  The fact that there are portions though that are VERBATIM what Michelle said is what the issue at hand is.  There are probably 3,000 ways to say "respect each other and value the opinions of those around you" and instead of picking any of the 2,999 other options she picked the one that was already done.

As to your point about the majority of the news being liberal I would disagree.  For every major news network that is pro-Clinton there is another that is pro-Republican (though not necessarily Trump).  Your local news might sway one way or another depending on where you are, but largely if you want to get an unbiased look at something you can if you try hard enough.

Maybe they just copied the same template. I'm sure if you look up "inspirational speeches", you'll find something from 2003 that looks stunningly similar to Michelle's speech.

And you don't think with the backlash stirred up over this whole thing at the moment that someone in the Trump camp hasn't been trying to do so for the past 12-18 hours now?  If it were out there, it would be out there as a defense for why Melania's looked almost exactly like Michelle's.

My point is that someone can't plagiarize something that is commonly used in speeches or in conversations. 

In the US, the vast majority of the media is liberal and most of them don't hide it. If you don't believe me, I'm fine with that. 

Sure if you want to get into the semantics of the word plagiarism and its practical application here.  However, doesn't change the fact that it is rather pathetic that someone making a speech about someone trying to run for the most important position in his country, and arguably the world, is ripping off words from someone who was doing the exact same thing eight years ago.

lol, wtf is even happening here. 

There is a fairly big difference between "copying" a greeting such as "hi, how are you doing?" and copying 66+ words of a speech verbatim, if you were to put that speech into plagiarizing test software it would show up instantly as a copy and not original work.

As others have said, if this was a copy of something which is used in day to day speech or as a template somewhere which Michelle used... then point to that rather than suggesting that you can't be plagiarizing if you just copy 66 words directly from something else, that would be enough leeway to be able to copy the majority of Pop music without issue.

I have it on good word that this is Trump's speech apparently:

“Good morning. In less than an hour, aircraft from here will join others from around the world. And you will be launching the largest aerial battle in the history of mankind. “Mankind.” That word should have new meaning for all of us today. We can’t be consumed by our petty differences anymore. We will be united in our common interests. Perhaps it’s fate that today is the Fourth of July, and you will once again be fighting for our freedom… Not from tyranny, oppression, or persecution… but from Hilary Clinton. We are fighting for our right to live. To exist. And should we win the day, the Fourth of July will no longer be known as an American holiday, but as the day the world declared in one voice: We will not go quietly into the night! We will not vanish without a fight! We’re going to live on! We’re going to survive! Today we celebrate our Independence Day! Benghazi! Pokemon Go! Crooked Hilary! You're Fired! Guns! Mexican Wall!”

Maybe it's a cry for help... she left out the last line, might be saying she is going to end it all?

Why are we surprised?

'Make America Great Again' isn't Trumps either.