NEW YORK ( TheStreet) -- When it comes to your portfolio, Jim Cramer said during Tuesday's "Stop Trading!" segment on CNBC, investors should assess whether President Barack Obama has any of the companies they own in his cross-hairs. For example, is oil President Obama's next attack? " Oil companies make a lot of money and use U.S. land," he said. "You need to look for Obama's next target." "The White House thinks the stock market is unimportant," Cramer continued. "We have a president turning on the stock market in a populous way." As a result, investors should focus on foreign stocks, Cramer recommends. He would hold about 20% to 25% in foreign stocks. "The United States is becoming unfriendly to business," Cramer said. "This country is getting tougher and tougher to make money in." Despite that, Cramer's buy for the day is the U.S.-based Apple ( AAPL), ahead of the unveiling of its tablet computer on Wednesday. Cramer owns Apple for his Charitable Trust portfolio, and recommends buying Apple on the dip that will be caused by hedge funds selling tomorrow. Above all else, Cramer said the tablet is a multi-year story. "Remember the iPhone wasn't an immediate hit," he said. -- Reported by Jeanine Poggi in New York. Follow TheStreet.com on Twitter and become a fan on Facebook.