What economist doesn't believe tax cuts stimulate the economy? That's one of the basic tenets of economics.
Are these people serious?
Successful, educated, hard-working people who prefer that government stay out of their faces and out of their wallets tend to vote for Republicans. On the other hand, unambitious, semi-literate, jobless people who look to government for mothering and "free stuff" tend to vote for Democrats.
If you were a politician, you would obviously want MORE, not less, of the kind of people who vote for your party.
Democrats thrive whenever there is a recession in which people lose their jobs, their homes, and their savings - - and so a recession is precisely the kind of economy that the Democrats are BEGGING for, especially since they attract votes based on promises of wealth and income redistribution (handouts) and that is a campaign strategy that happens to work best in a poor economy.
Therefore, the Democrats should not be expected to support any policies, including tax cuts, which might IMPROVE the economy - - that would be counterproductive to their selfish ambition of getting elected.
In the end, there is always a straight line between A and B.
The Democrats WANT a failing economy - - this isn't rocket science..