As recently as 2013 Trump supported the Dream Act. He called Romney mean spirited for his comments about self deportation.
You're referring to an illegal alien group who told Politico, after admitting they "crashed" a meeting, that Trump "lied" to them by saying he agreed with their position, then turned around and contradicted it later.
All this based on hearsay from the remembrance of illegal aliens recalling the memories of other illegal aliens.
Trump never, ever declared support for the dream act.
I posted what he wrote in his book published in 2011. His words.
Shhh..flip flops are ok with Trump. They are however not acceptable for another candidate who is 99% conservative.