TOPEKA, Kan. (AP) — Kris Kobach, a nationally known advocate of tough immigration policies and vocal supporter of President Donald Trump, launched a campaign Monday for the U.S. Senate in Kansas amid tepid support from some Republicans worried that his recent loss in the governor's race could threaten the party's Senate majority.

Kobach promised during a kickoff speech in Leavenworth outside the Kansas City area to fight aggressively for a wall along the U.S-Mexico border and to shrink government. He promised that he would "lead the charge" for Trump's agenda and fight the political establishm...