DES MOINES, Iowa (AP) — The longest serving Republican in the Iowa Legislature says he’ll become a Democrat. Rep. Andy McKean announced his decision Tuesday, saying one important factor was the presidency of Republican Donald Trump. McKean says he can’t support Trump, and if his behavior and leadership is the new normal, “I want no part of it.”

McKean, a 69-year-old retired attorney from the eastern Iowa city of Anamosa, first entered the House in 1979 and served seven terms. He left the legislature but returned to the Senate in 1993 and served three terms. He then won election to the House in 2016 and was re-elected in 2018. He’s now served nearly 29 years in the Legislature.

When he returned, McKean found he disagreed with Republicans on many high profile issues. McKean says he’ll register as a Democrat this week and plans to seek re-election as a Democrat in 2020.