By Tony Romeo

HARRISBURG, Pa. (CBS) - Pennsylvania Governor Tom Corbett has now given his support to Mitt Romney as the Republican nominee for president.

Governor Corbett’s endorsement of Romney came a week before the Pennsylvania primary, but a week after Romney’s chief rival, Rick Santorum, suspended his campaign.

And the endorsement came via a written statement released by the campaign, not at a public event, although Franklin and Marshall College pollster and political analyst Terry Madonna says that is consistent with Corbett’s style.

“On one level, it’s surprising that he didn’t have it in a public venue, but then knowing Corbett and his sort of reluctance to do big venue activities, that doesn’t come as big surprise.”

And even though it’s late, Madonna believes Corbett’s endorsement of Romney still has value in terms of the candidate’s need to pull the Republican Party together behind his campaign, although Madonna says the real test will be whether Corbett commits resources to Romney’s campaign in the months ahead.