WASHINGTON (Reuters) - U.S. Senator Jeff Flake, one of the Republican Party’s most vocal advocates for easing restrictions on U.S. dealings with Cuba, on Friday called on congressional leaders to allow a vote on legislation lifting restrictions on American travel there. “It is time Senate leadership finally allowed a vote on my bipartisan bill to fully lift these archaic restrictions which do not exist for travel by Americans to any other country in the world,” Flake, of Arizona, said, as President Donald Trump  announces a clampdown on U.S. travel and trade with the island. The “Freedom for Americans to Travel to Cuba Act,” led by Flake and Democratic Senator Patrick Leahy, of Vermont, is co-sponsored by 55 senators. Flake said he thought it could get 70 votes in the 100-member Senate if the chamber’s Republican leaders allowed a vote.  