Washington (CNN) - Republican Scott Brown will not vote for Elena Kagan, the Massachusetts senator announced Thursday, saying she lacks both the judicial and courtroom experience required of a Supreme Court justice.
"I cannot vote to confirm Elena Kagan. The reason is simple. I believe nominees to the Supreme Court should have previously served on the bench," Brown said in a statement. "Lacking that, I look for many years of practical courtroom experience to compensate for the absence of prior judicial experience. In Elena Kagan's case, she is missing both."
Kagan is expected to be confirmed Thursday as the 112th justice to the Supreme Court and could be sworn in to her judicial post by week's end.
Kagan has spent a substantial portion of her career in academia, a place that Brown views as lacking the real world gravitas of the nation's courtrooms.
"No classroom can substitute for the courtroom itself, where decisions are made that affect the day-to-day lives of American citizens, and where one's judicial character and temperament is shaped in favor of the fair and just application of the law," Brown said.
Five Republicans have so far signaled their intention to vote for Kagan, meaning the GOP doesn't have the strength in numbers in order to filibuster her nomination.
Only one Democrat, Sen. Ben Nelson of Nebraska, has announced his opposition.
A majority of Americans want the Senate to confirm Kagan to the Supreme Court, according to a CNN/Opinion Research Corporation poll released Tuesday. Fifty-four percent of people questioned say they would like to see senators vote in favor of Kagan's nomination, with 34 percent opposed.