Rep. James Lankford won Oklahoma's Republican Senate primary, in the race to succeed retiring GOP Sen. Tom Coburn.

With 95% of precincts reporting, Lankford, a minister and a member of the House GOP leadership, had 58% of the vote, while former state House Speaker T.W. Shannon, who was backed by a bunch of anti-establishment and tea party groups, had 34%, according to numbers compiled by The Associated Press. Five other candidates were on the ballot.

Meanwhile, the day's two marquee races were still too close to call.

Polls have closed in Mississippi and New York, where two of the longest-serving members of Congress are fighting for their political lives.

The primary contests involving Republican Sen. Thad Cochran of Mississippi and New York Rep. Charlie Rangel were considered the top contests Tuesday as seven states from the East Coast to the Mountain West held primaries.

(CNN)