America can both welcome immigrants and punish those who enter the country illegally, President Bush said here Monday in his latest push for a guest-worker program coupled with beefed-up border security. Bush didn't reveal new details about his guest-worker proposal in a 26-minute speech inside a hangar at Davis-Monthan Air Force Base. The president also didn't choose favorites among the host of proposals in Congress that deal with border and immigration issues. Bush did talk tough about illegal immigrants, first highlighting how they burden hospitals, schools and law enforcement in border states, then pledging to "promptly return every illegal entrant...