Friday starts the 18 day voting period for the March 3 Washington presidential primary.

The sharpest divide and the most critical decision to make in casting your ballot is your choosing between the 20th and 21st century. Whichever party’s ballot you cast and whichever candidate you pick, make your top priority determining if the candidate has the vision and capacity to lead this nation, and yes, still the world, into the 21st century.

Now, as we enter the second fifth of this not so new century – 20 years of it is over – will you demand leadership both qualified to and thinki...