The more we know about this threat, the more we know we have to act to defend against it.

The Stem Cell Research Enhancement Act would expand research on embryonic stem cells by increasing the number of lines stem cells that would be eligible for federally funded research.

The President and I agree that Social Security needs to be preserved so that we can ensure that all Americans receive the retirement benefits they've been promised. But we disagree as to how best to fix the system.

As you know, Social Security functions under the premise that today's workers will help finance benefits for retirees and that these workers will then be supported by the next generation of workers paying into the same system.

Our Nation's immigration laws are disrespected both by those who cross our borders illegally and by the businesses that hire those illegal immigrants.

It is estimated that raising the retirement age to 70 would cut the shortfall by about 36%. But this proposal has some drawbacks. Women and men who have worked jobs that require manual labor all of their lives may not physically be able to do work until they are 70 years old.