Revenues have increased under Trump: FY2018 total revenue is estimated at $3.654 trillion. That's higher than FY2016 (Obama's last full year), when revenue was $3.268 trillion.
However, expenditures have also increased under Trump, from $3.853 trillion in FY2016 to an estimated $4.094 trillion in FY2018.
Both parties have more or less gotten all the spending they have wanted since Trump took office. Democrats have mostly gotten the domestic spending increases they wanted, and Republicans have mostly gotten the military spending increases they wanted.