TOPEKA, Kan. (AP) — Kansas Secretary of State Kris Kobach says he has advised Donald Trump's campaign on immigration issues, particularly the GOP candidate's plan to force Mexico to pay for a border wall. Trump has proposed making Mexico pay for the wall by cutting off remittances that Mexicans living in the U.S. send back to their homeland, unless Mexico makes a one-time payment of $5 billion to $10 billion. Kobach, who has built a national reputation for fighting against illegal immigration, says the remittance plan is consistent with advice he gave Trump's campaign. He says he has spoken to Trump directly and the candidate was receptive to his ideas. The Topeka Capital-Journal reports the Trump campaign didn't respond to a request to elaborate on Kobach's involvement with the campaign.