Angela Merkel's key ally renewed his call on Friday for the German chancellor to change her stance on refugees after a poll showed the majority of Germans backed his demand for a limit to be imposed on the number of migrants entering the country.
"We will not give up on a ceiling," said Bavarian Premier Horst Seehofer, who also heads up the Christian Social Union (CSU), allies of Merkel's Christian Democrats.
A survey drawn up by pollsters TNS Emnid for the magazine Focus and released on Friday found that 60 per cent support imposing a cap.
Only 35 per cent back Merkel's rejection of an upper limit along the lines of the 200,000 a year proposed by Seehofer.
"It is purely and simply to do with our credibility," Seehofer told the news magazine Der Spiegel, acknowledging the political damage the conflict with Merkel over the upper limit was causing to the CDU-CSU.
Pollsters say the battle between Merkel and the CSU chief over how to handle the refugee crisis has been a major reason for the slump in support for the CDU-CDU bloc in opinion polls.
Seehofer said he wanted to end the conflict with Merkel before the CDU and CSU party conferences later this year.
But he went on to say: "What is also true is that there has to be a change in the policy if we want to win back confidence."
In addition to the other major German parties, Merkel's rejection of the CSU's call for an annual limit also has the backing of the chief of the nation's top court.
Andreas Vosskuhle, who heads the Constitutional Court, said earlier this year that placing a limit on the number of refugees entering the nation was contrary to the constitution, which calls on the country to provide refuge for those escaping persecution.
After climbing to about 1 million last year, the number of refugees entering Germany has dropped off dramatically this year.
Still, the TNS Emnid poll found that 64 per cent of CDU-CSU members still supported Seehofer's call for stemming the flow of refugees through imposing a limit.
TNS Emnid surveyed 1,002 German voters between September 13 and 14.
A different survey conducted by the International Rescue Committee (IRC) found that from among 12 European countries polled, Germany was the third most sympathetic towards Syrian refugees, with 84 per cent of Germans expressing some amount of sympathy.
Germans identified economic pressure as their top concern over refugees, with 39 per cent of respondents saying they were worried about the burden on the country's welfare system, while 29 per cent saying they were worried about integrating migrants.
Concerns that refugees could pose a risk to national security ranked low among Germans with only 25 per cent of respondents identifying it as a major threat.