Missouri lawmakers this week weighed several Republican-led bills that would allow prosecutors to criminally prosecute individuals in the United States illegally. The three bills would create new criminal offenses, such as trespass by an “illegal alien.” In some instances, prosecutors could only charge individuals if they have already been accused of another crime. The bills vary in how they define who is in the United States illegally. The legislation comes amid a nationwide debate over historic numbers of migrants at the U.S.-Mexico border. Republicans across the country, including Missouri …