Thornberry says the deal isn't perfect, but it was the best that could be hoped for for now and that's why he voted for it.
"Because it locks in current tax rates for 98 percent of American taxpayers, and it makes those rates permanent, so we don't have the threat of this tax increase caused by expiring tax law coming up every year," he says.
He says after 12 years of trying to get the tax law permanent, it finally happened.
Thornberry says the deal comes with its imperfections and he would have liked to have seen some tax provisions expire.
He also says he would have liked to have seen existing tax credits extended for everyone, including the wealthiest two-percent of Americans.
And, he says not all the issues are solved.
Thornberry says everyone on capitol hill will now turn their attention to the issue of cutting the deficit spending.
He says over the next couple months, expect intense debate about that issue coming from Washington.