Federal presidential-election-year campaigns are heating up in Colorado now that the boundaries of the state's congressional districts have been updated. Yet, so far, Mike Coffman and Scott Tipton, the Republican representatives of new more-competitive districts Six and Three, have yet to articulate for the record their stands on "personhood," the hard-line anti-abortion proposition that has become a litmus-test issue in Colorado after having landed on the ballot as an initiative in the last two general elections and after clearing hurdles to speed toward the ballot again this year.