Caucus was established in 1991 when ODS split from Civic Forum. 33 Deputies joined the Caucus.
The Caucus was reduced to 16 members following the 2013 legislative election. Zbyněk Stanjura became the Chairman. Jiří Pospíšil left the Caucus in 2014 leaving it with 15 members. Pospíšil was then elected a Member of European Parliament and lost his seat in the Chamber of Deputies. He was replaced by Vladislav Vilímec and the caucus returned to 16 seats. Alfred Beznoska left the Chamber in March 2017 and was replaced by Jan Skopeček.
Caucus consists of 25 members followinf the 2017 election.