She served as deputy chairperson of the CDU/CSU parliamentary group, under the leadership of successive chairs Volker Kauder (2015–2018) and Ralph Brinkhaus (2018–2021).

In the negotiations to form a coalition government under the leadership of Chancellor Angela Merkel following the 2017 federal elections, Connemann was part of the working group on municipalities and rural areas, led by Reiner Haseloff, Kurt Gribl and Michael Groschek.

In 2021, Connemann announced her candidacy to succeed Carsten Linnemann as chair of MIT, the pro-business wing in the CDU/CSU;[2] she won over Thomas Jarzombek.

[3] Since 2022, Connemann has been chairing – alongside Bernd Althusmann – a working group charged with drafting the CDU’s positions on energy policy.

[6] Connemann was one of only five CDU parliamentarians who voted against the government's draft law on introducing a national minimum wage for the first time in Germany's history in July 2014.