Nice idea, but they would never be able to do that. With all the leaks, and all the control, it would be impossible. The answer is that the people need to hold them accountable and in 2018, we vote them out! Plus we need to know how they voted for that very reason.

The 2018 election for congressmen will be very interesting.
In 2008 and 2012, there was a massive influx of people who never bothered to vote before, voting for Obama.  The moonbats saw that they finally had a chance to takeover the country.  They gave Obama and the moonbats the keys to the store.. and found out that Obama was not helping them out at all.  The people that voted for him largely became disenchanted with him.
In 2016, there was a massive influx of people voting to take the country BACK.  People who were registered to vote but rarely bothered to actually vote went to the polls.

In 2018, the moonbats have a no-win situation.
If they get control of Congress, then there will be total gridlock, which they will get blamed for - the country will suffer - and Trump will look even better.
If they further lose control of Congress, Trump will be able to get everything he wants done easily, the country will do great - and Trump will get the credit.

Secret voting doesn't allow the people to know how their politico voted.

I know.. but perhaps having them vote freely would have better results than mindless forced votes by party.