MILWAUKEE, Wis. (WTAQ) - Republican Scott Walker easily won his primary for governor Tuesday – but he only has less than half as much campaign money as his Democratic opponent.

Walker enters the final 7 weeks of the race with $1.2 million in hand. Tom Barrett built up $2.6 million in his bank without having to face a major Democratic primary opponent.

But observers say the funding difference won’t mean much in the end, because outside groups will advertise both for and against both candidates.

The Republican Governors Association has already spent over $1 million trying to link Barrett with incumbent Jim Doyle. The Greater Wisconsin Committee has advertised against Walker. And some observers say as much as $50 million could be spent on the governor’s race by the time all is said and done.

Walker had 59 percent of the Republican vote Tuesday, to 39 percent for Mark Neumann.