\begin{table}[htbp] 
\centering 
\caption{\bf Within-Pool Comparisons: Logistic Regression of Running on Ideology} 
\label{tbl_appendix_logit_run_33} 
\begin{tabular}{lcccccc} 
\toprule\toprule 
& \multicolumn{3}{c}{Democrats} & \multicolumn{3}{c}{~Republicans} \\ [.05in] 
Sample                 & Coeff.  & Std. Error  &  \# Obs.  & ~~Coeff.  &  Std. Error  &  \# Obs.  \\ [.01in] 
\midrule 
All pools              & -0.084 & (0.197) & [3898] & ~~1.080 & (0.232) & [5993] \\ [.01in] 
Open seats             & 0.203 & (0.239) & [2104] & ~~1.157 & (0.262) & [3001] \\ [.01in] 
Safe districts         & -0.208 & (0.267) & [1566] & ~~1.101 & (0.369) & [2910] \\ [.01in] 
Competitive districts  & 0.323 & (0.306) & [1527] & ~~1.205 & (0.289) & [2720] \\ [.01in] 
\bottomrule 
\end{tabular} 
\end{table} 
