Shares of Lockheed Martin (LMT - Get Report) are up 1.5% Tuesday after the company's earnings showed the defense business is going great guns.

Revenue climbed an impressive 15.7%, TheStreet's Jim Cramer, co-manager of the Action Alerts PLUS portfolio, said on CNBC's "Stop Trading" segment. Lockheed is an AAP holding.

Lockheed Martin is a holding in Jim Cramer's Action Alerts PLUS Charitable Trust Portfolio. Want to be alerted before Cramer buys or sells LMT? Learn more now.

Defense is strong and only getting stronger, Cramer added. One area of strong demand has been Lockheed's F-35 jet.

Lockheed's earnings results and today's durable goods report are combining to give wings to shares of Boeing (BA - Get Report)  ahead of its own earnings report Wednesday before the open. "Defense is a big theme going into the election," Cramer concluded.

At the time of publication, Cramer's Action Alerts PLUS had a long position in LMT.