Freshman Rep. Kyrsten Sinema, D-Ariz., raised about $400,000 in the second quarter, according to her campaign spokesman.

The campaign does not yet have a final tally, but estimates are that she will come in with $390,000 to $400,000 in quarterly fundraising, with about $550,000 in cash on hand.

She will need the money. The Rothenberg Political Report rates the 9th District as Democrat Favored, but it is situated in the pricey Phoenix media market and a competitive Republican field is already forming.

Possible Sinema challengers include retired Air Force Lt. Col. Wendy Rogers, who launched her campaign in March, while former Arizona State University football player Andrew Walter filed his statement of candidacy in April. Businessman Martin Sepulveda and 2012 GOP nominee Vernon Parker are also frequently mentioned contenders.