\begin{table}[htbp]\centering
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\caption{Within-Legislator Results For States Without Top Two Primaries (By Congress), 2009-2016 \label{TableFEByCongMRPTopTwo}}
\begin{tabular}{l*{4}{c}}
\hline\hline
                    &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}\\
                    &\multicolumn{1}{c}{Real Spending}&\multicolumn{1}{c}{Real Spending}&\multicolumn{1}{c}{Real Spending}&\multicolumn{1}{c}{Real Spending}\\
\hline
Electoral Security (MRP)&    -17784.4\sym{+}  &    -19163.5\sym{*}  &                     &                     \\
                    &    (9507.4)         &    (9530.9)         &                     &                     \\
[1em]
Electoral Security (Cook)&                     &                     &    -50292.8\sym{***}&    -46886.3\sym{**} \\
                    &                     &                     &   (14363.5)         &   (14653.8)         \\
[1em]
DW-Nominate (First Dim.)&                     &    495099.9\sym{***}&                     &    464253.2\sym{**} \\
                    &                     &  (144691.7)         &                     &  (150241.2)         \\
[1em]
Retiring            &                     &    -15234.9         &                     &    -16433.7         \\
                    &                     &   (13560.6)         &                     &   (13209.3)         \\
[1em]
House Tenure        &                     &     12186.3         &                     &     10235.8         \\
                    &                     &   (10955.5)         &                     &    (9824.3)         \\
[1em]
Majority            &                     &                     &                     &                     \\
                    &                     &                     &                     &                     \\
\hline
\(R^{2}\)           &       0.453         &       0.469         &       0.463         &       0.477         \\
Observations        &\num[group-separator={,}]{1490}         &\num[group-separator={,}]{1489}         &\num[group-separator={,}]{1490}         &\num[group-separator={,}]{1489}         \\
Number of House Members&\num[group-separator={,}]{589}         &\num[group-separator={,}]{589}         &\num[group-separator={,}]{589}         &\num[group-separator={,}]{589}         \\
Member Fixed Effects&         Yes         &         Yes         &         Yes         &         Yes         \\
Congress Fixed Effects&         Yes         &         Yes         &         Yes         &         Yes         \\
\hline\hline
\multicolumn{5}{l}{\footnotesize Heteroskedasticity robust standard errors clustered at the member level in parentheses}\\
\multicolumn{5}{l}{\footnotesize \sym{+} \(p<0.1\), \sym{*} \(p<0.05\), \sym{**} \(p<0.01\), \sym{***} \(p<0.001\)}\\
\end{tabular}
\end{table}
