Mashiach doesn’t come by talking about it the gemara says in chelek 97b
????? ?’ ?????? ???? ?? ????? ????? ????? ?????? ??? ??? ??? ?????? ??? ??? ??? ????? ?? ??? ????? ????? ??? ?????? ??? ???”? ????? ??? ??? ???????? ???? ???? ?????? ????? ????? ??????? ????? translation [found this on the online soncino talmud] R. Eliezer said: if Israel repent, they will be redeemed; if not, they will not be redeemed. R. Joshua said to him, if they do not repent, will they not be redeemed! But the Holy One, blessed be He, will set up a king over them, whose decrees shall be as cruel as Haman’s, whereby Israel shall engage in repentance, and he will thus bring them back to the right path.2
Although this gemara as some say could be talking about obama still moshiach soes not just come teshuva still must be done.