Lorentz Invariance in Reggeization of Pion Photoproduction Amplitudes

We study the implications of Lorentz and gauge invariance for Reggeization of the pion trajectory in charged pion photoproduction and find that the pion need not be introduced as a kinematical singularity. As a consequence of having a dynamical Regge pion pole, we find that effects characteristic of an $s$-channel nucleon pole appear automatically.