If there was 3 US Senators from each state instead of 2, here is the US Senate party breakdown.

[nkpolitics1212]

Class 1 (2018)
AL-Republican 53R
AK-Republican 54R
AR-Republican 55R
CO-Democratic 49D
GA-Republican 56R
ID-Republican 57R
IL-Democratic 50D
IA-Republican 58R
KS-Republican 59R
KY-Republican 60R
LA-Republican 61R
NH-Democratic 51D
NC-Democratic 52D
OK-Republican 62R
OR-Democratic 53D
SC-Republican 63R
SD-Republican 64R
Democrats would pick up AZ and NV, Republicans would pick up IN and MO.
Class 2 (2020)
AZ-Democratic 54D
CA-Democratic 55D
CT-Democratic 56D
FL-Democratic 57D
HI-Democratic 58D
IN-Republican 65R
MD-Democratic 59D
MO-Republican 66R
NV-Democratic 60D
NY-Democratic 61D
ND-Republican 67R
OH-Republican 68R
PA-Democratic 62D
UT-Republican 69R
VT-Democratic 63D
WA-Democratic 64D
WI-Democratic 65D
Democrats would pick up AZ(McCain-R),CO,and NC. 68D 66R
Class 3 (2022)
DE-Democratic 69D
ME-Democratic 70D
MA-Democratic 71D
MI-Democratic 72D
MN-Democratic 73D
MS-Republican 67R
MT-Republican 68R
NE-Republican 69R
NJ-Democratic 74D
NM-Democratic 75D
RI-Democratic 76D
TN-Republican 70R
TX-Republican 71R
VA-Democratic 77D
WV-Republican 72R
WY-Republican 73R
Democrats would pick up FL,PA,and WI 80D 70R

[D_Master81]

1. ???

so essentially we're attempting to answer a hypothetical question which will never happen.

[bearsfootball516]

2. Yeah, I'm not really sure where the OP was going with this.

[PJMcK]

3. Sorry, but what are you talking about?

The US Constitution makes it clear that each State gets two Senators.

You might as well say, "If there weren't an Electoral College, here's what the result would have been."

[Yavin4]

4. Then, you would need 90 senators to break a filibuster.

Good luck with that.

[bluepen]

5. What if each state had 21 Senators and 3 princesses?

[customerserviceguy]

6. That would give even more power

to the smallest states, most of which lean GOP. Ignoring the fact that it ain't gonna happen, I severely question your notion that three Senators instead of two per state would swing things our way.