OKLAHOMA CITY (AP) - Three Oklahoma congressmen have drawn opponents during the first day of a three-day filing period for this year's elections.

First District Rep. John Sullivan filed for re-election Wednesday and will face fellow Republican Jim Bridenstine in a June 26 primary election.

In the 4th District, Republican Rep. Tom Cole will face Gary D. Caissie in the Republican primary for the seat. The winner will face Democrat Donna Marie Bebo in the Nov. 6 general election.

Democrat Tom Guild has filed as a candidate in the 5th District against Republican Rep. James Lankford.

Third District Rep. Frank Lucas filed for re-election to his sprawling western Oklahoma district and so far has no challengers.

Oklahoma's only open congressional seat in eastern Oklahoma is drawing a deep field of political hopefuls.

Three Republicans and two Democrats had filed for the 2nd Congressional District seat by early Wednesday afternoon, the first of a three-day filing period.

Republicans Dustin Rowe of Tishomingo, Dakota Wood of Claremore, State Rep. George Faught (R-Muskogee) and Markwayne Mullin of Westville all filed their paperwork with the state Election Board on Wednesday. Democratic candidates who filed include Wayne Herriman of Muskogee and Earl Everett of Fort Gibson.

The candidates are seeking to replace U.S. Rep. Dan Boren, the lone Democrat in the state's congressional delegation who announced last summer he wouldn't seek a fifth term in office.

The district stretches across eastern Oklahoma from Kansas border south to the Red River.

The filing period continues Thursday and ends Friday. Primary runoffs, if required, will be conducted on Aug. 28.