Final answer:
The postcard was sent to Congress to express support for maintaining the nation's economic and judicial nationalism seen in the Era of Good Feelings.
Step-by-step explanation:
Congress considered proposals for a national bank, a protective tariff, and internal improvements, which aimed to benefit all regions of the country and promote economic growth. Supporters believed these measures would strengthen the economy, protect American industries, and improve transportation and communication networks. The postcard was sent to congress to express support for maintaining the nation's economic and judicial nationalism seen in the Era of Good Feelings.