As an academic he consulted the authors of many bills and laws adopted by parliaments starting from the Grand National Assembly, including the present Bulgarian Constitution.

In parliament he initiated constitutional and criminal law changes including such restricting the immunity of lawmakers, judges and prosecutors, creating the institution of Ombudsman and improving the accountability of the higher judicial bodies before the national legislature.

Mihail Mikov was appointed Minister of interior in the BSP lead government of Sergei Stanishev and occupied that post from April 2008 to July 2009.

Mikov revealed the staff of the Ministry of Internal Affairs for the first time since the start of the democratic changes in Bulgaria – a move that many NGOs insisted on and which is a normal practice across the EU.

In an interview around the premature end of his term as head of Bulgarian Parliament Mihail Mikov stated that he does not consider the mandate of the government and the ruling majority to be a failure.

[citation needed] Mihail Mikov was elected Chairman of BSP on July 27, 2014, succeeding Sergei Stanishev who lead the socialists for 13 years.

[11] At a pressconference after polls were closed Mihail Mikov admitted election defeat and pointed out that the party that won the most votes – the center-right GERB, now had the responsibility to form government.

On several rounds of consultations on the new government BSP highlighted its differences with GERB and announced it was to remain in opposition to the right lead majority in the new parliament[12] and the future Ministerial Council.