Tea Party Republican Dave Brat, who defeated House of Representatives Majority Leader Eric Cantor in a primary race on Tuesday, is an economics professor from a tiny Virginia college who attacked Cantor over immigration and budget issues.Brat describes himself a budget expert on his campaign website, saying he "presents a major problem for liberals who try to continue increased government spending by discrediting conservatives."During the primary campaign, Brat referred to himself as a "term limit" for Cantor, the No. 2 House Republican.In ads, Brat accused the majority leader of "giving citizenship papers to illegal immigrants."Cantor has said he opposes amnesty for undocumented immigrants but that Republicans could work with President Barack Obama on some border security reforms. He has said he was open to giving legal status to some undocumented children brought to the United States by their parents.