Mornings for Bruce Frasier, an onion and cantaloupe grower in southwest Texas, are tinged with anxiety over whether enough day laborers will arrive in vans to harvest his crops.

"It’s a heck of a way for a businessman to start his day," said Frasier, who visited Washington to express his concerns about a dwindling labor force as he sought to persuade members of his Republican Party to revise U.S. immigration laws.

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