In August 2016, the BSP and
Alternative for Bulgarian Revival (ABR), two opposition parties, officially nominated Radev as a candidate for the
2016 Bulgarian presidential election. In November 2016, the ABR withdrew its presidential nomination of Radev, favouring the election of
Ivaylo Kalfin. In the first round of the election on 6 November, Radev came first with 25.44% of the vote. He faced
GERB candidate
Tsetska Tsacheva in the runoff on 13 November. He defeated her, winning 59.37% of the popular vote. Since his election into office, Radev frequently criticised Bulgarian prime minister
Boyko Borisov, whom Radev viewed as permitting
corruption through a "reckless leadership style", as well as attempting to strangle his political opposition. This led Radev to frequently
veto legislative proposals submitted by GERB (Borisov's party) to the Bulgarian parliament (the
National Assembly), issuing a total of 19 vetoes in the first two and a half years of his presidency. Borisov accused Radev of "sabotaging the government's work", as well as supporting the opposition BSP during campaign periods. In his 2019
New Year's address, Radev stated that he believed that the
third Borisov government had failed in addressing corruption, placed the country in
economic stagnation with price increases and low wages, undermined the fairness of elections, and retreated from law and justice. Radev enjoyed positive approval ratings for the vast majority of his presidency. Having been elected with around 60% of the vote in 2016, he managed to keep that figure as his approval rating through to 2018. His approval then rose to 67% by May 2018, before falling to around 56% by autumn 2019; however, even after this fall in his popularity, he was still considered the most popular and approved of Bulgarian politician, as well as one of the only two Bulgarian politicians (the other being
Maya Manolova) with a higher percentage of approval than disapproval. By April 2020, Radev's approval ratings stood at about 49%. On 1 February 2021, Radev officially announced that he and
Iliana Iotova would run for a second term. The
2021 Bulgarian presidential election was held on 14 November. Prior to the election, several parties declared support for Radev, including
There is Such a People (ITN),
We Continue the Change (PP), and
BSP for Bulgaria (BSPzB). Radev and Iotova received 1,322,385 votes in the first round, 49.42% of the vote. This led to a second round run-off with the GERB-supported candidate
Anastas Gerdzhikov, who got 22.83% of the vote in the first round. Radev won in the run-off, with 66.7% of the vote, starting his second term as president. Radev began his second term with an approval rating of 58.5%, according to a
Gallup poll. Subsequently, Radev declined in popularity in opinion polls, reaching its lowest point of 33% in an Alpha Research poll in June 2023. Radev's approval recovered throughout 2024 and 2025, averaging around 40% before his resignation in January 2026. == Prime Minister-designate ==