On the national level, Mohring served as a CDU delegate to the Federal Convention for the purpose of electing the President of Germany in 2009, 2010 and 2012.

[2] In the negotiations to form a fourth coalition government under Chancellor Angela Merkel following the 2017 federal elections, Mohring was part of the working group on economic affairs, led by Thomas Strobl, Alexander Dobrindt and Brigitte Zypries.

In 2019, he was appointed by the leaders of CDU and CSU, Annegret Kramp-Karrenbauer and Markus Söder, to the parties’ ad-hoc steering group on climate policy.

[6] Ahead of the Christian Democrats’ leadership election in 2018, Mohring publicly opposed Friedrich Merz's candidacy to succeed Angela Merkel as the party's chair.

[7] For the 2021 national elections, he later endorsed Armin Laschet as the Christian Democrats' joint candidate to succeed Merkel as chancellor.