nashua new hampshire u.s. democratic presidential candidate hillary clinton say tuesday would consider make investment income taxable social security deductions bid keep government program afloat wall street journal report clinton front-runner party nomination nov. 2016 contest make comment campaign iowa lead slip recent weeks ahead state early vote contest worry certain recipients think important enhance benefit journal report clinton say campaign event city decorah extend life trust fund go take new fund say newspaper report clinton would consider raise undisclosed amount maximum income would subject 6.2 percent social security tax current rule money make investments well pension annuities interest consider income first 118,500 wag subject tax fear solvency social security system make important election issue clinton main rival democratic nomination bernie sanders describe social security nation successful government program call expansion say pay lift cap taxable income 250,000 voters iowa cast country early ballot caucus nominate contest feb. report alana wise edit simon cameron-moore sap sponsor coverage independently produce staff reuters news agency clinton weigh make investment income taxable social security