By David Morgan and Joey Roulette WASHINGTON (Reuters) -Democrats and some Republicans in the U.S. Senate discussed tightening reviews of gun buyers following the deadliest school shooting in nearly a decade, although members of both parties acknowledged action was unlikely. There is a wide gap between the two parties with Republicans arguing that new limits on legal gun purchases will do nothing to deter crime, despite impassioned pleas by Democratic President Joe Biden and some of his Senate colleagues to act. “My Republican colleagues can work with us now. I know this is a slim prospect, ve…