The White House is putting pressure on Senator Sam Brownback, to support Supreme Court nominee Harriet Miers.

The Kansas Republican, considering a White House run in 2008, has not said whether he will support the nomination. So the White House is seeking the help of GOP activists in Iowa and New Hampshire, both key early primary states, to pressure senators with possible presidential hopes.

Brownback's support is particularly important to Miers' nomination. He is one of 10 Republicans on the Senate Judiciary Committee, which will have the first vote on the nominee.

White House spokesman Scott McClellan has dismissed the possibility that Miers might withdraw if she encounters heavy fire in her Senate confirmation.