SANTIAGO, Chile - Instead of macho handshakes on the campaign trail, the leading candidates in Chile's presidential race are exchanging kisses on the cheek this election year. In this socially conservative country where domestic violence is common and women earn much less than men, the two top parties have selected female nominees, virtually ensuring that Chile will get its first female head of state. Opinion polls show the two women, Michelle Bachelet and Soledad Alvear, commanding huge leads over all other rivals for the Dec. 12 elections. "There are still some macho attitudes in our country, but all opinion polls...