Republican leaders brushed back President Clinton's proposal that Congress intervene in the baseball strike and force owners and players to accept arbitration. Though Clinton said special legislation may be the only way to get players back on the field this year, Senate Majority Leader Bob Dole and House Speaker Newt Gingrich maintain that Congress is "ill-suited" to solve the nearly six-month-old dispute. Still, the GOP pair met for 40 minutes with federal mediator W.J. Usery, who drafted the arbitration plan. House Minority Leader Richard Gephardt backed the president today, maintaining that low-wage vendors are the strike's hardest hit victims. The owners do not want arbitration, but Kansas City pitcher David Cone, who is helping lead negotiations for the players, is urging fans to prod their legislators to intercede.