Dan McDonald has been active in Republican Politics in Texas since 1998.

He took an active role in politics when Alan Keyes was running for President.  He volunteered as a block captain and was recruited to run for Precinct Chair.  Since then, he has assisted many campaigns with data, analysis, and door-knocking.

He served as precinct chair in Travis County from 2000 to 2010.  During that time he had two contested elections, both of which he won handily.  He was honored as SD 14 Volunteer of the Year in 2005, and Travis County Precinct Chair of the year in 2010.

He was elected as Travis County Republican Party Secretary in 2008 and again in 2010.

He served on the Nominations committee at the SD 14 Senatorial District Convention in 2000, and served as the chairman of the Credentials Committee in 2002,2004,2006,2008, and 2010.

He served on the State Credentials Committee at State Convention in 2002 and 2004, and at the Statewide Straw Poll in 2007.  He served on the State Rules Committee in 2006, 2008, and 2010.  He served as Congressional District 10 Caucus Chair in 2004 and 2008

After moving to Hays County he was elected as Hays County Republican Party Secretary.

He has served as election judge, alternate judge, and election clerk numerous times.

In 1998, he joined the board of Legacy PAC, and served as president of the board from 2004 to 2008.

He has been a member of the Central Texas Republican Assembly since their second meeting in 2001.  In 2009 he was elected as the Senatorial District 14 District Director to the Texas Republican Assembly, and served as Convention Parliamentarian at several conventions.  In 2011, he became the president of the Central Texas Republican Assembly.