It’s not too late for the Democrats running for the Senate and House to do what Sen. Ed Muskie (D-Maine) did for Democratic congressional candidates on the evening of the 1970 midterms: to tell the American people that the Republicans’ message that the Democrats are soft on crime is a lie. And they know it. Let’s go back to the fall of 1970. Richard Nixon had won the 1968 election over Democrat Hubert Humphrey by less than a percentage point, but conservative former Alabama Gov. George Wallace ran as an independent and carried 13.5 percent of the popular vote and...