Von der Leyen tweeted Monday that "tomorrow I will ask for the confidence of the European Parliament. Regardless of the outcome, I will step down as Minister of Defence on Wednesday in order to serve Europe with all my strength."
The EU parliament is expected to vote Tuesday on whether to confirm her as European Commission president.
Von der Leyen, 60, was the surprise last-minute compromise candidate nominated by the leaders of EU nations earlier this month to replace Jean-Claude Juncker.
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