Viktor Orban attends his Fidesz party campaign closing rally on April 6, 2018 | Laszlo Balogh/Getty Images EPP President Daul says Orbán crossed ‘red line’ Center-right bloc leader says group will debate whether to expel or suspend Hungarian PM’s party.

Hungarian Prime Minister Viktor Orbán crossed a "red line” when his government targeted Jean-Claude Juncker, the president of the European People's Party (EPP) said.

The Hungarian government, whose ruling Fidesz party is a member of the EPP along with Juncker, launched anti-migration campaign posters last month featuring the European Commission president and billionaire philanthropist George Soros.

EPP President Joseph Daul said in an interview with German newspaper Die Welt published Tuesday that the campaign — which accuses Brussels of pushing migration policies that threaten Hungary’s security — is “impermissible.”

“The European People’s Party is a big family, which can have its differences. But there is a limit and Viktor Orbán overstepped the red line,” Daul said.

Daul also told AFP Monday that the EPP will discuss on March 20 whether to exclude or suspend Fidesz after he received requests to do so from 12 member parties representing nine countries.

“The decision belongs to all members of the EPP and I cannot anticipate the outcome of the discussion,” Daul said.

The EPP has faced growing pressure to expel Fidesz, especially after Budapest launched the taxpayer-funded campaign against Juncker and Soros.

In an interview over the weekend, Orbán referred to those within the EPP who have called for his party’s ouster as “useful idiots," saying their efforts would only serve the interests of the left.

This story has been updated.