NEW : Mitt Romney tells a Latino group that President Obama failed them . The president has been criticized for his handling of the economy and immigration issues. The Obama administration files a trade complaint against China . Romney calls the trade complaint a campaign stunt .
NEW : Mitt Romney tells a Latino group that President Obama failed them . Obama says Romney does n't `` walk the walk '' on China . The Obama administration files a trade complaint against China . Romney calls the trade complaint a campaign stunt .