Despite President Donald Trump escalating his rhetoric to label high credit card rates as illegal, veteran strategist Ed Yardeni is brushing off the threat of a mandatory 10% cap as political noise that is unlikely to become law.The ‘Trial Balloon’ TheoryOn CNBC Monday, Yardeni addressed the notable decline in major bank stocks like JPMorgan Chase & Co. (NYSE:JPM) and Capital One Financial Corp. (NYSE:COF).The drop followed President Trump's severe ultimatum that credit card issuers must lower rates to 10% ...