BERLIN—German Chancellor Angela Merkel’s ruling conservatives are holding last-ditch talks this weekend to defuse an escalating dispute over immigration and avert a breakup of her government.
Horst Seehofer, who is Ms. Merkel’s interior minister and a party leader in her fragile coalition, has threatened to ignore a veto by the chancellor and forge ahead next week with a plan to turn away some migrants at the German border.
Doing...