Trump's border crackdown in a deep-red state amid a Senate battle threatening GOP control.
Context
What happened: President Donald Trump is expected to tout his immigration agenda at a rally just outside Wichita, Kansas, as the Senate race between Sen. Roger Marshall and pastor Adam Hamilton tightens.
Key numbers: ICE made over 100 arrests in a three-day Southwest Kansas sweep last month. The Cook Political Report downgraded the race to a toss-up earlier this month.
Why it matters: The Cook Political Report downgraded the contest to a toss-up, and money from GOP and Democratic groups is flowing into a state Trump won by double digits in the last three presidential cycles.