If pressed by whom? The press, the ACLU, public opinion? He did not violate one rule of criminal procedure. The matter of bail is set by the judge determined by the nature of the crime and/or a predetermined min/max amount. The prosecutor or defense attorney can argue one way or the other but it is up to him for the final outcome. He cannot be threatened or intimidated with civil or criminal repercussions because a judge is immune from civil liability. He is pretty much allowed to do what he wants in his courtroom. He can forbid police officers from carrying a firearm in his courtroom, he can seize a cellphone that rings during court, he can find anyone in contempt for pretty much any reason, talking, laughing, chewing gum period including suspects, defendants, attorney's and police officers.
If pressed, that will be his justification.