Aaron Bernstein/Reuters On Thursday, the Senate is expected to vote on its budget resolution, a key step towards tax reform. President Donald Trump teased the vote on Twitter, saying of he thinks the GOP has "the votes, but who knows?" GOP Sen. Rand Paul is the only Republican projected to vote against the measure. President Donald Trump teased the upcoming vote on the fiscal year 2018 budget on Twitter Thursday, appearing to be cautiously optimistic on the prospects for the major step towards passing the GOP tax reform plan. "Republicans are going for the big Budget approval today, first step toward massive tax cuts," Trump tweeted.