What Article 1 puts in issue

I HAVE followed the cross-examination by the defense lawyers at the impeachment trial. Their attempts at getting their client off the hook are valiant — but really, misplaced. They ask, for example, whether they know for a fact that checks were issued in the name of Sara Z. Duterte. They demand to know whether the witnesses can testify that she appropriated the amounts to herself, that she deposited them in her account.