A large Republican field is forming to oppose Democratic Rep. Bill Foster in Illinois’ 14th District.

The latest entrant is state Sen. Randy Hultgren, who recently filed a statement of organization with the Federal Election Commission and who formally announced his candidacy on Monday.

Hultgren served eight years in the Illinois House (1999-2007) and was elected to the Illinois Senate in 2006, replacing Republican Peter Roskam, who was elected to Congress from the 6th District.