The chairman of Bavaria's Christian Social Union (CSU) said on Monday he was ready to turn away at the German border migrants registered in other European Union states if Chancellor Angela Merkel does not seal an EU migrants deal later this month.
"We wish the chancellor much luck," Horst Seehofer, who is also German interior minister told a news conference after the CSU unanimously backed his new immigration plan.
"But we stick to our position that should the immediate rejection at the border not be possible, I would immediately order the police that people who either have prohibition of entry or prohibition of stay should be immediately turned away at the border," he said.
This includes migrants who have either registered or applied for asylum in another EU country, he added.
Donald Trump, the US, president, on Monday launched an unprecedented attack on German migration policy, falsely linking it to a rise in crime.
It came after intense disagreement with the two over Germany's migration policy looked as if it threatened to topple the coalition government and Mrs Merkel's premiership.
Mrs Merkel says she will report back on July 1. Mr Seehofer said he'd be glad to see a European agreement, but "we want this national solution unless a European solution comes together."
Mrs Merkel told a news conference on Monday that an unjustified turning away of people from Germany's borders could unleash a domino effect, but she said she had agreed to a CSU demand for a ban on admitting people who had earlier been expelled.