The Immigration and Nationality Act mandates that all immigrants and refugees undergo a medical screening examination to determine whether they have an inadmissible health condition. The Centers for Disease Control and Prevention has technical instructions for medical examination of prospective immigrants in their home countries before they are permitted to enter the U.S. They are screened for communicable and infectious diseases such as tuberculosis, malaria, hepatitis, polio, measles, mumps and HIV. They are also tested for syphilis, gonorrhea and other sexually transmitted diseases. The CDC also has medical screening guidelines for refugees. These screenings are usually performed 30 to 90 days after refugees arrive in the United States.

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With the continuing hysteria about Donald Trump's presidency, a few questions come to mind. The first: Can a bad man become a good president? The second: Does one's being a good man guarantee he'll be a good president? Third: Does having a good president require a good man? Is there any evidence of Lord Acton's argument that "great men are almost always bad men"?

I think former President Jimmy Carter was a good man who became a weak and bad president, both in domestic matters and in foreign affairs. President Bill Clinton was a bad man who became a reasonably good president in domestic and foreign matters. But then there was that impeachment issue that greatly tarnished his presidency.

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During the weekend of Aug. 4-5 (and the preceding Friday night), 12 Chicagoans were shot dead, and 62 others were shot and wounded, the Chicago Tribune reported (https://tinyurl.com/yde7jb83). Before last week's mayhem, 1,718 Chicagoans had been shot since the beginning of the year, and 306 had been murdered. Adding to this tragedy is the fact that Chicago's clearance rate is less than 15 percent. That means that in more than 85 percent of Chicago's homicides, no suspect is charged. Chicago is by no means unique in this lawlessness. Detroit, Baltimore, Philadelphia, St. Louis and some other major cities share high rates of homicides.

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Many of the nation's colleges have become a force for evil and a focal point for the destruction of traditional American values. The threat to our future lies in the fact that today's college students are tomorrow's teachers, professors, judges, attorneys, legislators and policymakers. A recent Brookings Institution poll suggests that nearly half of college students believe that hate speech is not protected by the First Amendment. Of course, it is. Fifty-one percent of students think that it's acceptable to shout down a speaker with whom they disagree. About 20 percent of students hold that it's acceptable to use violence to prevent a speaker from speaking. Over 50 percent say colleges should prohibit speech and viewpoints that might offend certain people (http://tinyurl.com/yayxt45u). Contempt for the First Amendment and other constitutional guarantees is probably shared by the students' high school teachers, as well as many college professors.

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