The claim

The Congressional Leadership Fund targeted Rita Hart, the Democratic candidate for Iowa’s 2nd Congressional District seat, in a mailer sent to voters in October. The ad states, “In the State Senate, (Rita Hart) raised the gas tax, voted against simplifying the income tax system, and supported allowing a tax increase on cattle." "Hart is supported by national Democrats who voted to allow the US Export-Import Bank to provide loans supporting the Chinese government.” “In the State Senate, Hart voted to allow exemptions for certain health plans to drop coverage for preexisting conditions. One health insurance company that benefited from this vote had previously contributed to her campaign.”