Answer based on context:

The Vikes fell to 4-3 with a loss at home on Monday Night Football to the New England Patriots. The Pats, who came out passing instead of bothering to even try challenging the Vikings rush defense, got out to an early lead on the opening drive as QB Tom Brady hit WR Reche Caldwell for a 6-yard touchdown pass. Kicker Stephen Gostkowski connected on a 23-yard field goal early in the second quarter. Brady threw his second of what would turn out to be four touchdown passes, this time to TE Benjamin Watson just before halftime to give the Pats a 17-0 lead. The Vikes finally got on the board as RB Mewelde Moore returned a punt 71 yards for a touchdown early in the third quarter. That would be all the Vikes could muster as Brady threw his final two touchdowns to wide receivers Troy Brown and Chad Jackson respectively to close out the scoring.

How many points did Patriots lead with by halftime?
17