In Half-Blood Prince first Cornelius Fudge and then Rufus Scrimgeour pressure Dumbledore to sanction a meeting with Harry, hoping to cash in on Harry's new-found popularity and credibility in the public eye. Dumbledore refuses to sanction the meeting, to the chagrin of both Ministers.
But, if Scrimgeour was so keen to meet Harry, why couldn't he come and see him in person at Privet Drive. The Ministry knows where Harry lives during the summer; they'd previously sent several owls to his address over disciplinary matters, after all. Dumbledore wouldn't have been able to know about or stop any such meeting.
Scrimgeour ends up taking the opportunity to speak to Harry at the Burrow when he's away from Hogwarts anyway. Surely he had no need to argue with Dumbledore. He could've just gone directly to Harry himself.
Why didn't Scrimgeour just do the straight-forward thing and visit Harry at Privet Drive?