President Donald Trump keeps saying that Republicans' mega tax and spending cut legislation will eliminate taxes on federal Social Security benefits.It does not.At best, Trump's “no tax on Social Security” claim exaggerates the benefits to seniors if either the House or Senate-passed proposals is signed into law.

Donald Trump’s multitrillion-dollar tax bill is running into Republican resistance in the House as moderate and ultra-conservative GOP lawmakers threaten to defy the president and sink his domestic agenda.

The class inversion of the two parties is making it trickier for Republicans to cut the social safety net.