BERLIN (Reuters) - Migration is an issue that demands a European solution, German Chancellor Angela Merkel insisted on Saturday, giving no ground in a showdown with her Bavarian allies that threatens her three-month-old coalition.
The row is over Merkel's rejection of plans by Interior Minister Horst Seehofer, from Bavaria, for Germany unilaterally to send back migrants who have registered in other European Union countries.
Such a reversal of her 2015 open-door migrant policy would be a huge blow to the authority of Merkel, in power for more than 12 years, and undermine the Schengen open-border system at a time when EU tensions over migration are running high.
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In her weekly podcast, three days before talks between Merkel and French President Emmanuel Macron outside Berlin, the chancellor hammered home her stance:
"This is a European challenge that also needs a European solution. And I view this issue as decisive for keeping Europe together," she said.
Merkel wants two weeks to try to strike bilateral deals with partners, such as Italy and Greece, on migrants and to make progress at an EU summit on June 28-29 on an EU-wide policy.
Seehofer's Christian Social Union (CSU), facing a tough state vote in October, doesn't want to wait. Members say the minister will defy Merkel on Monday if no compromise has been reached by then, and go ahead with the plans alone.
Such an affront to Merkel could force her to fire Seehofer, and there is even talk of the end of the 70-year conservative parliamentary alliance between Bavaria and Merkel's Christian Democrats (CDU).
Without the CSU, the CDU and Social Democrats (SPD), the third party in her "grand coalition", would lack a majority.
Last week, Merkel confronted the risk of losing the full support of her own CDU, many of whom support the CSU's tougher line. But she won over a majority of her lawmakers on Thursday and most are now behind her.
Merkel's refugee policy, which has led to more than 1.6 million migrants arriving in Germany in the last three years, is widely blamed for a surge in support for the far-right Alternative for Germany (AfD), which entered parliament after a September election and is the main opposition party.
In her podcast, Merkel also said Germany and France, the EU's strongest axis despite some differences, would try to give new momentum to European cooperation on foreign, defense and security policy to contribute to a strong and unified Europe.
She also said the partners would work on further developing the economic and currency union and innovation.
(Reporting by Madeline Chambers, editing by Larry King)