In May 2007, the head of Turkey's High Court asked prosecutors to consider whether Erdoğan should be charged over critical comments regarding the election of Abdullah Gül as president. Erdoğan said the ruling was "a disgrace to the justice system", and criticized the Constitutional Court which had invalidated a presidential vote because a boycott by other parties meant there was no quorum. Prosecutors investigated his earlier comments, including saying it had fired a "bullet at democracy". Tülay Tuğcu, head of the Constitutional Court, condemned Erdoğan for "threats, insults and hostility" towards the justice system.