The front-runner Republican candidate hoping to unseat Missouri Democratic Senator Claire McCaskill continues to lag behind her in fundraising.     Attorney General Josh Hawley’s campaign spokeswoman Kelli Ford in a Wednesday email said he brought in about $1.87 million from April through June. That’s less than half of the more than $4.3 million McCaskill raised.     Ford says Hawley has about $3 million in cash to spend. McCaskill’s c…