Former Alaska governor Sarah Palin has warned Donald Trump of "massive disappointment" if he backs down on his plan to deport undocumented immigrants.
The Republican presidential nominee has signalled he will soften his immigration plan, which was a central plank of his primary campaign.
Instead of sending all 11 million people living illegally in the US, he now says only criminals will go.
Mrs Palin's backing of Trump in January was regarded as a coup.
But on Friday she told the Wall Street Journal that "wishy-washy positions" on core positions would result in "massive disappointment".
"Parts of the message we heard in the last week are clearly not consistent with the stringent position and message that supporters have received all along," she said.
This week Trump has openly talked about how tough it is to break up families and said people who have been in the US a long time and not broken any laws should stay.
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