Amy Walter:

Absolutely.

They are counting on the optimism that Americans have now about the country to translate into support for Republicans, right? The Republicans are here, the economy is doing well, don't rock the boat, don't take us off course.

The challenge, though, is one person who is supposed to do the selling and has certainly promoted himself as one of the best salesman of all time is not particularly a disciplined salesperson, number one.

And, number two, views of the tax plan do line up pretty directly with your views on President Trump. The reason that you saw those numbers climb in that poll that you showed from Monmouth is, you also should show that the president's approval rating rose from December until this month.

And so, if you like the presidents, right now, you will like the tax plan. If you don't like the president, you don't like the tax plan or you're undecided on the tax plan. And that's the group of voters right now that both sides are fighting over.

In fact, Democrats, too, are a little bit concerned now. A lot of Democrats were convinced when this vote was happening that they were going to be able to cast this as a corporate-only plan that was going to hurt the middle class. Now that you have the economy doing well, bonuses are going out to people, and whether it's $1.50 or $200 coming back, that's a very good message for Republicans to sell.

I'm hearing now from some Democrats who worry that we need to do what Republicans did in 2009 and 2010 to Obamacare, which is to continue to put it in a negative light and make our messaging stick.