Former U.S. Housing and Urban Development Secretary Julián Castro has canceled visits to Linn and Johnson counties this weekend because of the urgency to end the Trump administration policy of separating parents and children who enter the country illegally.“It’s most important to me to lend a strong voice,” so he will be with activists outside El Paso Sunday “to keep the pressure up, to get the president to change his policy.“I will be a part of the effort to hold the administration’s feet to the fire to do this in safe and speedy way,” Castro said.Castro, who has said he’ll make a decision this year whether to seek the Democratic nomination for president in 2020, was scheduled to attend fundraisers for Democratic candidates in Cedar Rapids and Iowa City Saturday.“There’s excellent work happening in Iowa to elect Democrats in November and I’m looking forward to contributing to that effort in the weeks to come,” he said Wednesday.However, he’s planning to participate in a rally outside El Paso Sunday.“It’s most important to me to lend a strong voice … to keep the pressure up, to get the president to change his policy,” Castro said.The issue of family separation is personal to Castro.