The constitution places no restrictions on who may be chancellor. In practice, the president only proposes a person as chancellor who has previously garnered a majority support in prior coalition talks and traditionally does not interfere in those talks. However, after the "Jamaica coalition" talks failed in the wake of the 2017 election, President Steinmeier invited several Bundestag party leaders to try to bring them together to form a working government.
The constitution places no restrictions on who may be chancellor In practice the president only proposes a person as chancellor who has previously garnered a majority support in prior coalition talks and traditionally does not interfere in those talks However after the "Jamaica coalition" talks failed in the wake of the 2017 election President Steinmeier invited several Bundestag party leaders to try to bring them together to form a working government